CIEŚLA, Elżbieta. Physical Fitness of Six and Seven-Year Old Children and Its Environmental Determinants. INSTED: Interdisciplinary Studies in Education & Society, [S. l.], v. 15, n. 3(59), p. 93–110, 2012. Disponível em: https://insted-tce.pl/ojs/index.php/tce/article/view/215. Acesso em: 8 jun. 2025.