Engel, Robin S.; Tillyer, Marie Skubak; Corsaro, Nicholas (June 2013). "Reducing Gang Violence Using Focused Deterrence: Evaluating the Cincinnati Initiative to Reduce Violence (CIRV)". Justice Quarterly. 30 (3): 403–439. doi:10.1080/07418825.2011.619559. S2CID40777215.
Engel, Robin S.; Tillyer, Marie Skubak; Corsaro, Nicholas (June 2013). "Reducing Gang Violence Using Focused Deterrence: Evaluating the Cincinnati Initiative to Reduce Violence (CIRV)". Justice Quarterly. 30 (3): 403–439. doi:10.1080/07418825.2011.619559. S2CID40777215.