KALINOWSKA, Wioleta, NAPIERAŁA, Marek and GOTOWSKI, Rafał. Physical activity leisure time students from secondary school Ignacy Dzialynski in Golub-Dobrzyn. Journal of Education, Health and Sport. Online. 2 February 2017. Vol. 7, no. 2, pp. 135-150. [Accessed 8 May 2024].