Przyborowska, Beata, and Piotr Błajet. “School Principals’ Perception of Changes in Their Health Behaviours During the Syndemic”. Przegląd Badań Edukacyjnych (Educational Studies Review) 1, no. 49 (August 15, 2025): 25–39. Accessed November 11, 2025. https://apcz.umk.pl/PBE/article/view/55860.