RT Article T1 Youth gangs and troublesome youth groups JF European journal of criminology VO 2 IS 1 SP 5 OP 37 A1 Esbensen, Finn-Aage 1951- A1 Weerman, Frank M. 1968- A2 Weerman, Frank M. 1968- LA English YR 2005 UL https://krimdok.uni-tuebingen.de/Record/1912753324 DO 10.1177/1477370805048626