@article{Stulpe1988,
  author    = {Stulpe, Werner},
  title     = {Conditional Expectations, Conditional Distributions, and A Posteriori Ensembles in Generalized Probability Theory},
  series = {International Journal of Theoretical Physics. 27 (1988), H. 5},
  journal   = {International Journal of Theoretical Physics. 27 (1988), H. 5},
  isbn      = {1572-9575},
  pages     = {587 -- 611},
  year      = {1988},
  language  = {en}
}
@article{StulpeGudderHagler1988,
  author    = {Stulpe, Werner and Gudder, S. and Hagler, J.},
  title     = {An Uncertainty Relation for Joint Position-Momentum Measurements},
  series = {Foundations of Physics Letters. 1 (1988), H. 3},
  journal   = {Foundations of Physics Letters. 1 (1988), H. 3},
  isbn      = {1572-9524},
  pages     = {287 -- 292},
  year      = {1988},
  language  = {en}
}