[1]
Havik, T. and Ertesvåg, S. 2020. Systematic review and classification of: Olweus Bullying Prevention Program (OBPP) – A School-Wide Program Against Bullying and Antisocial Behavior (2. ed.). Ungsinn. Journal of Effective Interventions for Children and Adolescents. 12, 1 (May 2020). DOI:https://doi.org/10.7557/25.7584.