RT Article T1 Encounters with aggressive peers in early childhood - frequency, age differences, and correlates of risk for behaviour problems JF International journal of behavioral development VO 17 IS 4 SP 675 OP 696 A2 Pettit, Gregory S. A2 Harrist, Amanda W. A2 Dodge, Kenneth A. 1954- A2 Bates, John E. 1945- A2 Sinclair, Jamie J. LA English YR 1994 UL https://krimdok.uni-tuebingen.de/Record/1639412506 K1 Kinder K1 Verhaltensstörung K1 Aggression K1 Kindesalter