1. United states department of justice. Federal bureau of investigation. Crime in the United States; 2012.
2. Youth violence in the United States: major trends, risk factors, and prevention approaches;Dahlberg;Am J Prev Med,1998
3. Furlong MJ. Evaluating school violence trends. National School Safety Center News Journal. 1994;323–327.
4. US. Department of justice and US. Department of education. First annual report on school safety. Washington: DC; 1998.
5. On the distinction between attentional deficits/hyperactivity and conduct problems/aggression in child psychopathology;Hinshaw;Psychological Bulletin,1987