FachnerG, ThorkildsenZ. (2015). Ambushes of Police: Environment, Incident Dynamics, and the Aftermath of Surprise Attacks Against Law Enforcement. (Office of Community Oriented Policing Services, Washington, DC.)
2.
FalkO, WalliniusM, LundströmS, et al. (2014). The 1% of the population accountable for 63% of all violent crime convictions. Soc Psychiatry Psychiatr Epidemiol. 49, 559–571.