Grzegorczyk, J., Mazur, E. and Domka, E. (2008) “Assessment of physical activity of pupils in two selected junior high schools in the Podkarpacie”, European Journal of Clinical and Experimental Medicine, 6(3), pp. 226–234. Available at: https://journals.ur.edu.pl/ejcem/article/view/13237 (Accessed: 26 June 2026).