RT Article T1 Explaining high-risk concentrations of crime in the city: Social disorganization, crime opportunities, and important next steps JF Journal of research in crime and delinquency VO 51 IS 4 SP 480 OP 498 A1 Braga, Anthony Allan 1969- A2 Clarke, Ronald V. 1941- LA English YR 2014 UL https://krimdok.uni-tuebingen.de/Record/1912549824 DO 10.1177/0022427814521217