Rivalries, reputation, retaliation, and repetition: Testing plausible mechanisms for the contagion of violence between street gangs using relational event models. - Jason Gravel; Matthew Valasik; Joris Mulder; Roger Th. A. J. Leenders; Carter T. Butts; P. Jeffrey Brantingham; George E. Tita (Netw. Sci., 2023)