@article{StulpeBusch2008,
  author    = {Stulpe, Werner and Busch, Paul},
  title     = {The structure of classical extensions of quantum probability theory},
  series = {Journal of Mathematical Physics. 49 (2008), H. 3},
  journal   = {Journal of Mathematical Physics. 49 (2008), H. 3},
  isbn      = {1089-7658},
  pages     = {1 -- 22},
  year      = {2008},
  language  = {en}
}