Kalinowski, Paweł, Katarzyna Kulicka, Dariusz Pietranis, Monika Nowakowska, Michał Pietrzak, and Andrzej Wieczorek. 2019. “Organizational Structure of the German Club Berliner TSC”. Journal of Education, Health and Sport 9 (1):317-25. https://apcz.umk.pl/JEHS/article/view/6555.