Kurzeja, P., J. Prusak, M. Miśkowiec, T. Szurmik, and M. Mrozkowiak. “Selected Aspects of Health Behaviors Among Junior High School Students”. Journal of Education, Health and Sport, vol. 9, no. 4, Apr. 2019, pp. 168-79, https://apcz.umk.pl/JEHS/article/view/6791.