FIRLEJ, Ewelina, JANISZEWSKA, Mariola, BYZDRA, Mariusz, PAWLIKOWSKA-ŁAGÓD, Katarzyna and DĄBSKA, Olga. The phenomenon of mobbing in the opinion of the professionally active. Journal of Education, Health and Sport. Online. 19 July 2017. Vol. 7, no. 7, pp. 363-372. [Accessed 7 April 2025].