Bartkowicz, Zdzisław, and Andrzej Chudnicki. “Cyberaggression at School – Challenges for Teachers”. Journal of Education, Technology and Computer Science 27, no. 1 (March 30, 2019): 70–76. Accessed December 5, 2025. https://journals.ur.edu.pl/jetacomps/article/view/5688.