Tracz, Marta Barbara, Marek Napierała, and Rafał Gotowski. 2016. “Somatic Construction and Performance of 13-Year General Kayakers in Kujawsko - Pomorskie and Wielkopolska Province”. Journal of Education, Health and Sport 6 (10):832-60. https://apcz.umk.pl/JEHS/article/view/4254.