RT Article T1 Preadolescent peer status, aggression, and school adjustment as predictors of externalizing problems in adolescence JF Child development VO 61 IS 5 SP 1350 OP 1362 A1 Kupersmidt, Janis B. A2 Coie, John D. LA English YR 1990 UL https://krimdok.uni-tuebingen.de/Record/164003952X K1 Verhaltensauffälligkeit K1 Aggression