RT Article T1 The Schengen Treaties and European Police Co-operation JF European journal of crime, criminal law and criminal justice VO 1 IS 1 SP 37 OP 56 A1 Fijnaut, Cyrille 1946- LA English YR 1993 UL https://krimdok.uni-tuebingen.de/Record/1639627898 K1 Schengener Abkommen DO 10.1163/157181793X00161