Szymanek-Pilarczyk, M. 2021. The effects of supplementary plyometric training on the development of selected motor skills of young football players from Akademia Raków Częstochowa football club. Sport and Tourism Central European Journal. 4, 1 (Mar. 2021), 129–138. DOI:https://doi.org/10.16926/sit.2021.04.07.