TY - JOUR A1 - Stulpe, Werner A1 - Busch, Paul T1 - The structure of classical extensions of quantum probability theory T2 - Journal of Mathematical Physics. 49 (2008), H. 3 Y1 - 2008 UR - https://opus.bibliothek.fh-aachen.de/opus4/frontdoor/index/index/docId/3450 SN - 1089-7658 N1 - 032104 SP - 1 EP - 22 ER -