RT Article T1 United Nations standards and norms in the area of juvenile justice in theory and practice JF Research on crime and criminal justice at the Max Planck Institute SP 87 OP 94 A1 Kiessl, Heidrun LA English YR 1998 UL https://krimdok.uni-tuebingen.de/Record/1422588432 SN 3861130270 K1 Vereinte Nationen K1 Jugendstrafrecht