Pająk, Michał, Rafał Mazur, Sebastian Masternak, and Katarzyna Skórzyńska-Dziduszko. “Popularity of Marijuana Among Polish Students”. Journal of Education, Health and Sport 7, no. 9 (September 11, 2017): 167–177. Accessed February 11, 2025. https://apcz.umk.pl/JEHS/article/view/4799.