Schultze-Krumbholz, A., M. Hess, J. Pfetsch, and H. Scheithauer. “Who Is Involved in Cyberbullying? Latent Class Analysis of Cyberbullying Roles and Their Associations With Aggression, Self-Esteem, and Empathy”. Cyberpsychology: Journal of Psychosocial Research on Cyberspace, vol. 12, no. 4, Dec. 2018, p. Article 2, doi:10.5817/CP2018-4-2.