فیشر، ریچارد و بیلی، ریچارد. (1391). استعدادیابی و استعدادپروری در ورزش. ترجمه دکتر فرناز ترابی و شقایق جعفرپور، چاپ اول، تهران: نشر علوم ورزشی (حتمی).
		                                                                                        			                                                		خادمی، مژگان؛ محمدی، عیسی و ونکی، زهره. (2014). مروری روایتی بر مضامین و ویژگیهای اساسی در نظریه بنیادی کلاسیک. مجله ایرانی آموزش در علوم پزشکی، 14(6)، 539–549.
		                                                                                        			                                                		خنیفر، حسین و مسلمی، ناهید. (1395). اصول و مبانی روشهای پژوهش کیفی: رویکردی نو و کاربردی. چاپ اول، تهران: نگاه دانش.
		                                                                                        			                                                		Abraham, S. (2018). Made in Germany: DFB, decided to revamp their game through the youth system—The Economic Times. https://economictimes.indiatimes.com/news/sports/made-in-germany-dfb-decided-to-revamp-their-game-through-the-youth-system/articleshow/59730031.cms?from=mdr
		                                                                                        			                                                		Alagic, A. (2017). German football is reaping the rewards of their football strategy -Amir Alagic’s blog. https://xtratime.in/german-football-is-reaping-the-rewards-of-their-football-strategy-amir-alagics-blog/
		                                                                                        			                                                		Augste, C., & Lames, M. (2011). The relative age effect and success in German elite U-17 soccer teams. Journal of Sports Sciences, 29(9), 983–987. https://doi.org/10.1080/02640414.2011.574719
		                                                                                        			                                                		Baker, J., Schorer, J., & Wattie, N. (2018). Compromising Talent: Issues in Identifying and Selecting Talent in Sport. Quest, 70(1), 48–63. https://doi.org/10.1080/00336297.2017.1333438
		                                                                                        			                                                		Bate, A. (2018). Belgium are much more than a golden generation and it is not luck. Sky Sports. https://www.skysports.com/football/news/12098/11387201/belgium-are-much-more-than-a-golden-generation-and-it-is-not-luck
		                                                                                        			                                                		Bender, T, Schild, T., & Schweizer, H. (2011). 10 Years of Academies—Talent pools of top-level German football.pdf. DFL Deutsche Fußball Liga GmbH. https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnx0b3Jnc2FoYWl1a2VufGd4OjYzMjE5NzZmZDRmNWVhY2I
		                                                                                        			                                                		Bender, Tom, Schild, T., & Schweizer, H. (2011, March 25). 10 Years of Academies—Talent pools of top-level German football.pdf. DFL Deutsche Fußball Liga GmbH. https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnx0b3Jnc2FoYWl1a2VufGd4OjYzMjE5NzZmZDRmNWVhY2I
		                                                                                        			                                                		Bloom, A. M. (2017, October 24). The Equalizer: What we can learn from Belgium. The Tufts Daily. https://tuftsdaily.com/sports/2017/10/24/equalizer-can-learn-belgium/
		                                                                                        			                                                		Boehm, A. (2004). Chapter 5.13 “Theoretical Coding: Text Analysis in Grounded Theory.” Sage Publications Ltd.
		                                                                                        			                                                		Browaeys, B. (2013). The Belgian vision on youth development. https://www.soccercoach.eu/inter/belvision.pdf
		                                                                                        			                                                		Brown, W. (2013). Youth Football: French Excellence. VAVEL. https://www.vavel.com/en/football/2013/05/31/241021.html
		                                                                                        			                                                		BVB. (2017). BVB partners are “Elite Football Academies.” http://www.bvb.de/eng/News/Overview/BVB-partners-are-Elite-Football-Academies/
		                                                                                        			                                                		Chesler, D. (2013). 2001-2013 The Evolution of Youth Academy Programs. Technical Director Course - International Academy Case Study. http://resources.ussoccer.com/n7v8b8j3/cds/Email/131106-TECHNICAL-SUMMARY-ICS-GERMANY-Chesler-v.1.pdf
		                                                                                        			                                                		Coerver. (2019). Coerver news. https://www.coerver.gr/news
		                                                                                        			                                                		Corbin, J. M., Corbin, J., & Strauss, A. (2008). Basics of Qualitative Research: Techniques and Procedures for Developing Grounded Theory. SAGE Publications.
		                                                                                        			                                                		Crane, M. (2017). Comparative success of professional football academies in the top five English leagues during the 2016/17 season.
		                                                                                        			                                                		Deutsche Welle. (2016). Football Made In Germany. https://www.dw.com/en/football-made-in-germany/av-19284127
		                                                                                        			                                                		DeutscheWelle. (2007, Mach). German and US Soccer Officials Sign Cooperation Deal | Sports. Deutsche Welle. https://www.dw.com/en/german-and-us-soccer-officials-sign-cooperation-deal/a-2383611
		                                                                                        			                                                		DFB. (n.d.). Talente_DFB Leitfaden_Ziele_und_Strukturen_Talentfoerderprogramm-. https://www.badfv.de/files/Dokumente/2.06_Talente/Talente_DFB-Leitfaden_Ziele_und_Strukturen_Talentfoerderprogramm.pdf
		                                                                                        			                                                		DFB. (2007, October 23). DFB and French Federation FFF intensify their relations: DFB - Deutscher Fußball-Bund e.V. DFB News. https://www.dfb.de/news/detail/dfb-and-french-federation-fff-intensify-their-relations-12534/
		                                                                                        			                                                		DFB. (2013a). Dfbnet Broschuere. DFB. https://www.dfb.de/fileadmin/_dfbdam/25700-DFBnet-Broschuere-Neuauflage-2013-EN.pdf
		                                                                                        			                                                		DFB. (2013b). Dfbnet Broschuere. DFB. https://www.dfb.de/fileadmin/_dfbdam/25700-DFBnet-Broschuere-Neuauflage-2013-EN.pdf
		                                                                                        			                                                		DFB. (2014a). Talent Development in the German Football Association. https://www.soccercoach.eu/info/gftalent.pdf
		                                                                                        			                                                		DFB. (2014b). Talent Development in the German Football Association. Deutscher Fußball-Bund. https://www.soccercoach.eu/info/gftalent.pdf
		                                                                                        			                                                		DFB. (2015). Talent Development Programme: Projects: DFB - Deutscher Fußball-Bund e.V. https://www.dfb.de/en/projects/talent-development-programme/
		                                                                                        			                                                		DFB. (2016). DFBnet and FUSSBALL.DE. DFB. https://www.dfb.de/fileadmin/user_upload/DFBnetBroschuere_ENG_FINAL_WEB.pdf
		                                                                                        			                                                		DFB. (2017). Masterplan Koordinator- WDFV. https://wdfv.de/media/masterplan_stellenausschreibung__fvn.pdf
		                                                                                        			                                                		DFB - Deutscher Fußball-Bund. (2014). DFB-Youth development program. http://www.kthi.is/skrar/file/Fyrirlestur%20%C3%BEj%C3%B3%C3%B0verjans.pdf
		                                                                                        			                                                		DFB - Deutscher Fußball-Bund. (2015). DFB-Seminar” Football worldwide experiences in economic, education and social actions”. Seminar”Football worldwide experiences in economic, education and social actions”. https://www2.camara.leg.br/atividade-legislativa/comissoes/comissoes-temporarias/especiais/55a-legislatura/reformulacao-da-legislacao-do-esporte/documentos/audiencias-publicas/jennifer-schroder
		                                                                                        			                                                		Dieker, A. (2017). Youth Development in Germany: The Structure that won World Cup 2014. EIF Soccer. http://www.eifsoccer.com/articles/youth-development-germany/
		                                                                                        			                                                		DJW. (2011). Why Germany is so successful with Youth Development. RangersMedia. http://forum.rangersmedia.co.uk/topic/202941-why-germany-is-so-successful-with-youth-development/
		                                                                                        			                                                		Doostdari, S., Ashraf Ganjoui, F., & Soheily, B. (2015). A Survey of Football Talent Identification Problems. Journal of Sport Management, 7(4), 621–635. https://doi.org/10.22059/jsm.2015.55971
		                                                                                        			                                                		Englisch, J., Schott, U., Hink, W., Köttker, R., Ullrich, H., Strich, D., Blask, H., & Paepke, J. (2016). European sport policy-Overview of sport issues on the EU agenda. https://www.dfb.de/fileadmin/_dfbdam/125449-EU_Sportpolitik_E_2016_web.pdf
		                                                                                        			                                                		Ermisvfland. (2014). The German Football Masterplan. https://ermisvfland.wordpress.com/2014/04/10/the-german-football-masterplan/
		                                                                                        			                                                		ESTO. (2017). ESTO-Germany-Report. European Syntethic Turf Organisation. https://www.estc.info/wp-content/uploads/2017/05/ESTO-Germany-Report.pdf
		                                                                                        			                                                		FA. (n.d.). Schools’ Competition National Football Framework. http://www.thefa.com/~/media/files/pdf/get%20into%20football/schoolscompetitionframework.ashx
		                                                                                        			                                                		Feichtinger, P. (2015). Psychological diagnostics in the talent development program of the German Soccer Association: A stepwise procedure to examine the relevance of personality characteristics in talented soccer players [Universität Tübingen]. https://doi.org/10.15496/publikation-8552
		                                                                                        			                                                		FFA. (2007). National Football Development Plan- Making Australia a World Leader in the World Game. http://www.klufc.org.au/publications/ffa-national-football-development-plan
		                                                                                        			                                                		FFA. (2015). Whole_of_Football_Plan-Australia. http://www.wholeoffootballplan.com.au/pdfs/Whole_of_Football_Plan.pd
		                                                                                        			                                                		Fundação Real Madrid. (2014, July 15). German Football Association—Talent Development [Sports]. https://www.slideshare.net/PedMenCoach/german-football-association-talent-development
		                                                                                        			                                                		Gagnon, J. P. (2014). 10 years of Academies by The Deutscher Fussball Bund (DFB). Samourais Du Web. http://www.samouraisduweb.com/2014/09/10-years-of-academies-by-deutscher.html
		                                                                                        			                                                		Gagnon, J.-P. (2014, September 26). 10 years of Academies by The Deutscher Fussball Bund (DFB) [Samourais du web]. http://www.samouraisduweb.com/2014/09/10-years-of-academies-by-deutscher.html
		                                                                                        			                                                		Glaser, B. G. (1978). Theoretical sensitivity: Advances in the methodology of grounded theory. Sociology Press.
		                                                                                        			                                                		Goalzz. (2010). Germany reap rewards of youth system. https://www.goalzz.com/?n=73266
		                                                                                        			                                                		Grossmann, B., & Lames, M. (2013). Relative Age Effect (RAE) in Football Talents – the Role of Youth Academies in Transition to Professional Status in Germany. International Journal of Performance Analysis in Sport, 13(1), 120–134. https://doi.org/10.1080/24748668.2013.11868636
		                                                                                        			                                                		Grossmann, B., Lames, M., & Stefani, R. (2015a). From Talent to Professional Football – Youthism in German Football. International Journal of Sports Science and Coaching, 10(6), 1103–1114. https://doi.org/10.1260/1747-9541.10.6.1103
		                                                                                        			                                                		Grossmann, B., Lames, M., & Stefani, R. (2015b). From Talent to Professional Football – Youthism in German Football. International Journal of Sports Science and Coaching, 10, 1103–1114. https://doi.org/10.1260/1747-9541.10.6.1103
		                                                                                        			                                                		Güllich, A. (2013). Selection, de-selection and progression in German football talent promotion. European Journal of Sport Science, 14(6), 530–537. https://doi.org/10.1080/17461391.2013.858371
		                                                                                        			                                                		Hackbarth, T., Hildebrandt, Dr. A., Hink, W., Gunter, Prof. D., Pilz, A., Rieth, Dr. L., Schulte, S., & Tietz, O. (2013). Football Is The Future. https://www.dfb.de/fileadmin/_dfbdam/27985-DFB_Nachhaltigkeitsbericht_ENG.pdf
		                                                                                        			                                                		Hadavi, F., & Zarifi, A. (2009). Talent Identification and Development Model in Iranian Athletics. https://www.semanticscholar.org/paper/Talent-Identification-and-Development-Model-in-Hadavi-Zarifi/3d8298131a32dacfc7cdb669121b60f663dc6594
		                                                                                        			                                                		Han, K. (2016). 5 Lessons in Talent Management from the German National Football Team. Blog Heavenhr. https://blog.heavenhr.com/2016/06/14/5-lessons-in-talent-management-from-the-german-national-football-team/
		                                                                                        			                                                		Heidelberg University. (2016). Further information the the institut. https://www.issw.uni-heidelberg.de/informations.html
		                                                                                        			                                                		Hesse, U. (2016). How Germany’s awful Euro 2000 forced a mass restructure–and why it wouldn’t work for England. https://www.fourfourtwo.com/features/how-germanys-awful-euro-2000-forced-a-mass-restructure-and-why-it-wouldnt-work-england
		                                                                                        			                                                		Honigstein, R. (2015, September 5). How German football rose from the ashes of 1998 to become the best in the world. The Observer. https://www.theguardian.com/football/2015/sep/05/germany-football-team-youth-development-to-world-cup-win-2014
		                                                                                        			                                                		Howie, L., & Allison, W. (2015). The English Football Association Charter for Quality: The development of junior and youth grassroots football in England. Soccer & Society, 1–10. https://doi.org/10.1080/14660970.2015.1100897
		                                                                                        			                                                		James, S. (2013). How Germany went from bust to boom on the talent production line. https://www.theguardian.com/football/2013/may/23/germany-bust-boom-talent
		                                                                                        			                                                		James, S. (2014, June 6). Belgium’s blueprint that gave birth to a golden generation | Stuart James. The Guardian. https://www.theguardian.com/football/blog/2014/jun/06/belgium-blueprint-gave-birth-golden-generation-world-cup-
		                                                                                        			                                                		Jones, M., & Alony, I. (2011). Guiding the Use of Grounded Theory in Doctoral Studies – An Example from the Australian Film Industry. International Journal of Doctoral Studies, 6. https://doi.org/10.28945/1429
		                                                                                        			                                                		Kazinform. (2012, July 20). Kazakhstan, Germany develop children football together. Kazinform. https://www.inform.kz/en/article/2480796
		                                                                                        			                                                		Kim, J. (2008). An Analysis of Talent Development in Korean and German Football [Seoul National University]. https://www.semanticscholar.org/paper/An-Analysis-of-Talent-Development-in-Korean-and-Kim/5fff3eeafe4f5a4465bc1fbb0714ff7367392d55
		                                                                                        			                                                		Köln, F. (, n). Youth academy—1. FC Köln. https://fc.de/en/fc-info/club/youth-development/youth-academy/
		                                                                                        			                                                		Kulish, N. (2012). As Europe Struggles, Germany Invests Heavily in Soccer—The New. The New York Times. https://www.nytimes.com/2012/12/26/sports/soccer/as-europe-struggles-germany-invests-heavily-in-soccer.html
		                                                                                        			                                                		Lewis, R. (2007). A review of young player development in professional football—Ngin. The FA & Premier League & The Football League. http://assets.ngin.com/attachments/document/0001/3697/ReviewofYoungPlayerDevelopment1_1_.pdf
		                                                                                        			                                                		Lindberg, M. (2015). Ulf Schott – Director of the German Football Federation | Sports Business institute. Sports Business Institute Barcelona. http://sbibarcelona.com/test/ulf-schott-director-of-the-german-football-federation/
		                                                                                        			                                                		Long, D. (2018, August 9). Clairefontaine – The heart of the French revolution. Your Site Title. https://thefootballpink.com/posts/2018/10/25/clairefontaine-the-heart-of-the-french-revolution
		                                                                                        			                                                		M Williams, A., & Reilly, T. P. (2000). Talent identification and development in soccer. 18(9), 657–667. https://doi.org/10.1080/02640410050120041
		                                                                                        			                                                		Malone, E. (2014). Inside German Football: Vorsprung durch technique - Germany’s formula for success. https://www.irishtimes.com/sport/soccer/international/inside-german-football-vorsprung-durch-technique-germany-s-formula-for-success-1.1958435
		                                                                                        			                                                		Mann, D., Dehghansai, N., & Baker, J. (2017). Searching for the Elusive Gift: Advances in Talent Identification in Sport. Current Opinion in Psychology, 16. https://doi.org/10.1016/j.copsyc.2017.04.016
		                                                                                        			                                                		Mendonça, Í. de O. (2014). Bundesliga Report—10 years of academies—Talent pools of top-level. https://www.slideshare.net/italomen/dfl-leistungszentren2011-gb
		                                                                                        			                                                		Ming, L. (2017). Analysis of the Main Causes of the Successful Development of German Football and Its Enlightenment to China. 4th International Conference on Education, Management, Arts, Economics and Social Science (ICEMAESS 2017). https://doi.org/10.2991/icemaess-17.2017.131
		                                                                                        			                                                		Moher, D., Liberati, A., Tetzlaff, J., & Altman, D. (2009). Moher D, Liberati A, Tetzlaff J, Altman DG, Group PPreferred reporting items for systematic reviews and meta-analyses: The PRISMA statement. PLoS Med 6: e1000097. Open Medicine : A Peer-Reviewed, Independent, Open-Access Journal, 3, e123-30. https://doi.org/10.1016/j.jclinepi.2009.06.005
		                                                                                        			                                                		Niemann, A., & Brand, A. (2008). The impact of European integration on domestic sport: The case of German football. Sport in Society, 11(1), 90–106. https://doi.org/10.1080/17430430701717822
		                                                                                        			                                                		Norman, A., Barnhofer, N., Brause, S., Brideband, J., Dohren, T., Eiermann, S., Elgner, F., Geis, M., Grittner, J., Hackbarth, T., Hartwig, K., Herz, M., Hofmann, S., Ludeke, S., Morsch, M., Muller, C., Muras, U., Rajber, R., Scheffler, P., … Voigt, H.-U. (2015). DFB_A-Z_UK_lowRes.pdf. DFB. https://www.dfb.de/fileadmin/_dfbdam/61175-DFB_A-Z_UK_lowRes.pdf
		                                                                                        			                                                		Ofthedoor. (2013, March 19). How France detects and produces young football players year after year. Reddit. https://www.reddit.com/r/soccer/comments/1alzrz/how_france_detects_and_produces_young_football/
		                                                                                        			                                                		Osman, S. (2013). AFC renew partnership with German Football Association | Goal.com. Goal. https://www.goal.com/en-sg/news/3952/asia/2013/02/22/3770796/afc-renew-partnership-with-german-football-association
		                                                                                        			                                                		Parliament. (2011, July 29). House of Commons—Football Governance—Culture, Media and Sport Committee. Parliament. https://publications.parliament.uk/pa/cm201012/cmselect/cmcumeds/792/79210.htm
		                                                                                        			                                                		Peltola, E. (1992). Talent Identification. 7(3), 7–12.
		                                                                                        			                                                		Premier League. (2019). Premier League Elite Player Performance Plan—EPPP. https://www.premierleague.com/youth/EPPP
		                                                                                        			                                                		Price, L. (2015). The Bundesliga Blueprint: How Germany Became the Home of Football. Bennion Kearny, Limited. https://books.google.com/books?id=B3z2sgEACAAJ
		                                                                                        			                                                		Price, Lee. (2015). The Bundesliga Blueprint: How Germany Became the Home of Football.
		                                                                                        			                                                		Régnier, G., Salmela, J., & Russell, S. J. (1993). Talent detection and development in sport. Handbook of Research on Sport Psychology, 290–313.
		                                                                                        			                                                		Ringrose, F. (2017, June 9). Intensive exchange between clubs and associations at first Chinese-German Football Summit. SVG Europe. https://www.svgeurope.org/blog/headlines/intensive-exchange-between-clubs-and-associations-at-first-chinese-german-football-summit/
		                                                                                        			                                                		Rose, F. (2016). Market Insight: The Bundesliga - Europe’s gold mine for the continent’s best young talent. https://www.soccerex.com/insight/articles/2016/the-bundesliga-europe-s-gold-mine-for-the-continent-s-best-young-talent
		                                                                                        			                                                		Sandelowski, M., & Barroso, J. (2007). Handbook for Synthesizing Qualitative Research. Springer Publishing Company.
		                                                                                        			                                                		Schmidt, S., & Stegmann, T. (2016a). Creating World Champions: How German Soccer Went from Shambles to Champions. Meyer & Meyer Sport. https://books.google.com/books?id=9Lp4DwAAQBAJ
		                                                                                        			                                                		Schmidt, S., & Stegmann, T. (2016b). Creating World Champions: How German Soccer Went from Shambles to Champions. Meyer & Meyer Sport.
		                                                                                        			                                                		Schmitt, M. (2015). Youth development in German football, part one: Investing. https://www.bayerncentral.com/2015/02/youth-development-german-football-investing/
		                                                                                        			                                                		Schorer, J., & Elferink-Gemser, M. (2013). How good are we at predicting athletes’ futures. Developing Sport Expertise: Researchers and Coaches Put Theory into Practice. 2nd Ed. London: Routledge, 30–40.
		                                                                                        			                                                		Simon. (2015). DFB - Youth Development | Football | German football youth development | German grassroots football. Arsenal-Esque. http://arsenal-esque.blogspot.com/2015/03/dfb-youth-development-football-germany.html?m=1
		                                                                                        			                                                		Soccer Camps. (2019). England Summer Football Soccer Camps, Soccer Schools Training England. Soccer Camps International. https://soccercampsinternational.com/england-soccer-camps/
		                                                                                        			                                                		Soccer Ground. (n.d.). Mini Pitches—SoccerGround. USP GmbH & Co. KG. https://www.soccerground.com/downloads/soccerground-products.pdf
		                                                                                        			                                                		Soccer Ground. (2018). DFB 1000 Mini Pitches project-The largest Grass Roots initiative of the German Football Association. https://www.soccerground.net/news/mini_pitches/35/DFB-1000-mini-pitches-project
		                                                                                        			                                                		Staff Writer. (2017, June 27). FFA signs Memorandum of Understanding with DFB. MyFootball. https://www.myfootball.com.au/news/ffa-signs-memorandum-understanding-dfb
		                                                                                        			                                                		Stahl, R. (2001). The French Football Federation Youth Development Program Working with year old Players—PDF. DocPlayer. https://docplayer.net/22870760-The-french-football-federation-youth-development-program-working-with-13-15-year-old-players.html
		                                                                                        			                                                		Stahl, R. (2002). THE FRENCH FOOTBALL FEDERATION TECHNICAL ADVISORY BOARD AND PLAYER SELECTION PROCESS. 3.
		                                                                                        			                                                		Stöber, B. (2017). The road to success Bernd Stöber. DFB. http://www.aefca.eu/contenu/uploads/2017/11/The-road-to-success-Bernd-Stöber.pdf
		                                                                                        			                                                		The FA. (2011). Long Term Player Development—Ngin. https://assets.ngin.com/attachments/document/0001/6827/LTPD_ThePage.pdf
		                                                                                        			                                                		Tschan, F. (2008). Bund Deutscher Fussball-Lehrer (BDFL) International Coaches Convention. Bund Deutscher Fussball-Lehrer. https://www.yumpu.com/en/document/view/38035315/bund-deutscher-fussball-lehrer-bdfl-international-coaches-
		                                                                                        			                                                		TSG 1899 Hoffenheim. (n.d.). Elite School » TSG Hoffenheim. https://www.achtzehn99.de/en/teams/academy/elite-school/
		                                                                                        			                                                		Tupas, C. P. (2011, June 10). Germans boost PFF grassroots program. Inquirer.Net. https://sports.inquirer.net/4738/germans-boost-pff-grassroots-program
		                                                                                        			                                                		University of Alabama at Birmingham. (2019). UAB Soccer Camp with Mike German—Soccer Skill Development Camp for Younger People. UAB Soccer Camp. https://uabsoccercamp.com/
		                                                                                        			                                                		Van Hoecke, J, Schoukens, H., Lochmann, M., & Laudenklos, P. (2008). Foot PASS Deutschland: Managing Performance in the Bundesliga through the Certification of Youth Academies. 16th Conference of the European Association for Sport Management: book of proceedings. http://easm.net/download/2008/1c3275cdcfe4b7acd42f74b683e1ab93.pdf
		                                                                                        			                                                		Van Hoecke, J, Schoukens, H., Simm, S., Isakowitz, M., & Sutter, R. D. (2010). Refinement of the Foot PASS model for a high quality certification academy. 18th Conference of the European Association for Sport Management: book of proceedings. https://www.easm.net/download/2010/d38a78aa22cee9d2041317e9cdfe66f0.pdf
		                                                                                        			                                                		Van Hoecke, J, Schoukens, Simm, H., Isakowitz, S., Sutter, M. D., & Robbie. (2011). The Classification Of Youth Academies In German Professional Football Clubs. 19th Conference of the European Association for Sport Management: book of proceedings. https://www.easm.net/download/2011/f5b0343de5aa6b3b48b0958ee6741e02.pdf
		                                                                                        			                                                		Van Hoecke, Jo, Schoukens, H., Simm, S., & De Bosscher, V. (2009). Measuring the performance of professional youth academies: The case of the Bundesliga. 17th Conference of the European Association for Sport Management: book of proceedings. http://www.easm.net/download/2009/c6fd1e9aa46360250e029719340fe027.pdf
		                                                                                        			                                                		Votteler, A., & Honer, O. (2014). The relative age effect in the German Football TID Programme: Biases in motor performance diagnostics and effects on single motor abilities and skills in groups of selected players. Eur J Sport Sci, 14(5), 433–442. https://doi.org/10.1080/17461391.2013.837510
		                                                                                        			                                                		Votteler, A., & Höner, O. (2017). Cross-sectional and longitudinal analyses of the relative age effect in German youth football. German Journal of Exercise and Sport Research, 1–11. https://doi.org/10.1007/s12662-017-0457-0
		                                                                                        			                                                		Weiss, S. (2013, July 18). German Youth Development. Goonersphere. http://goonersphere.com/team-lineup/simon-says/58-german-youth-development
		                                                                                        			                                                		Whitney, C. (2013). Gotze & Reus Are Just the Start: How German Football Produces Talent Without End. Bleacher Report. https://bleacherreport.com/articles/1589510-gotze-reus-are-just-the-start-how-german-football-produces-talent-without-end