Maciejewska, M., I. Janik-Fuks, A. Wilczyńska, A. Wawryków, M. Stecko, A. Fabian-Danielewska, and K. Korabiusz. “Stress and Burnout Syndrome in Teachers – Review of the Literature”. Journal of Education, Health and Sport, vol. 9, no. 6, June 2019, pp. 420-6, https://apcz.umk.pl/JEHS/article/view/7053.