Ron Avi Astor, Benbenishty, Rami , Marachi, Roxana , Hajyahia, Muhammad M, Zeira, Anat , Perkinshart, Suzanne , and Pitner, Ronald O. 2002. “The Awareness Of Risky Peer Group Behaviors On School Grounds As Predictors Of Students' Victimization On School Grounds: Part I-Elementary Schools”. Journal Of School Violence, 1, Pp. 11–33.