Kalinowski, P., & Judreczka, K. (2015). Elementy szkolenia w piłce nożnej. Różnice w szkoleniu klubu polskiego i niemieckiego = Training elements in football. Differences in the training system between polish club and german club. Journal of Education, Health and Sport, 5(11), 542–550. Retrieved from https://apcz.umk.pl/JEHS/article/view/3235