RT Article T1 Open drug scenes and police strategies in Oslo, Norway JF Journal of Scandinavian studies in criminology and crime prevention VO 18 IS 2 SP 141 OP 156 A1 Olsen, Hilgunn LA English YR 2017 UL https://krimdok.uni-tuebingen.de/Record/1643223984 K1 Police strategies K1 Drug policy K1 Illicit drugs K1 Harm reduction K1 Dual-track policy K1 Open drug scene