RT Article T1 Why are single parents more often threatened with violence? A question of ecological vulnerability JF International review of victimology VO 8 SP 183 OP 198 A1 Wikström, Suzanna A2 Wikström, Per-Olof H. 1955- LA English YR 2001 UL https://krimdok.uni-tuebingen.de/Record/164032013X K1 Gewalt K1 Alleinerziehende