ZUŃ, K.; ZYCH, M.; RZĄCA, M. S.; KOCKA, K. The Internet addiction among students of primary schools and lower and upper secondary schools and its relation to their level of physical activity. Journal of Education, Health and Sport, [S. l.], v. 7, n. 12, p. 531–544, 2017. Disponível em: https://apcz.umk.pl/JEHS/article/view/5144. Acesso em: 16 aug. 2024.