BIEŃ, Łukasz. Impact of recreational physical activity on social and economic aspects of national security in literature. Progress, [S. l.], n. 6, p. 126–145, 2019. DOI: 10.26881/prog.2019.6.10. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/Progress/article/view/4107. Acesso em: 22 jul. 2024.