Pawłucki, Andrzej. “The Importance of Metaphysics in the Theory of Nontrivial Physical Education – Polish Tradition”. Sport and Tourism Central European Journal 4, no. 2 (June 21, 2021): 107–123. Accessed November 24, 2024. https://czasopisma.ujd.edu.pl/index.php/sport/article/view/1253.