1. Bully/victim problems among school children: basic effects of a school-based intervention program;Olweus,1991
2. Bullying at school: what we know and what we can do;Olweus,1993
3. Bullying behaviors among US youth: prevalence and association with psychological adjustment;Nansel;JAMA,2001
4. Understanding bullying fact sheet 2013;The Centers for Disease Control and Prevention,2011
5. School bullying among adolescents in the United States: physical, verbal, relational, and cyber;Wang;J Adolesc Heal [Internet] Elsevier Ltd,2009