1. Disorder, Order and Control Signals;Bottoms;British Journal of Sociology,2009
2. Centers for Disease Control and Prevention 2014 Injury Prevention & Control: Data & Statistics. Web-Based Injury Statistics Query and Reporting System (WISQARSTM). Fatal Injury Data and Nonfatal Injury Data. http://www.cdc.gov/injury/wisqars/index.html
3. Cook , Phillip J. Jens Ludwig 1997 National Institute of Justice: Research in Brief https://www.ncjrs.gov/pdffiles/165476.pdf
4. Mass, Serial, and Sensational Homicides;Dietz;Bulletin of the New York Academy of Medicine,1986