CZARNECKI, D.; SKALSKI, D.; GRYGUS, I. Free time of elderly people in terms of physical activity. Quality in Sport, [S. l.], v. 8, n. 4, p. 33–38, 2022. DOI: 10.12775/QS.2022.08.04.003. Disponível em: https://apcz.umk.pl/QS/article/view/41065. Acesso em: 29 mar. 2024.