VIOREL PETRU, A.; CIPRIAN, M.; CAIUS, M. Study regarding the impact of the number of physical education classes at primary level. Arena-Journal of Physical Activities, [S. l.], n. 5, p. 143–154, 2017. Disponível em: https://www.uav.ro/jour/index.php/ajpa/article/view/832. Acesso em: 27 mar. 2026.