@article{StulpeSinger1992,
  author    = {Stulpe, Werner and Singer, Matthias},
  title     = {Phase-Space Representations of General Statistical Physical Theories. Singer, Matthias; Stulpe, Werner},
  series = {Journal of Mathematical Physics. 33 (1992), H. 1},
  journal   = {Journal of Mathematical Physics. 33 (1992), H. 1},
  isbn      = {1089-7658},
  pages     = {131 -- 142},
  year      = {1992},
  language  = {en}
}
@article{Weigand1992,
  author    = {Weigand, Christoph},
  title     = {A new Approach for Optimal Control of a Production process},
  series = {Economic Quality Control. 7 (1992)},
  journal   = {Economic Quality Control. 7 (1992)},
  isbn      = {0940-5151},
  pages     = {225 -- 251},
  year      = {1992},
  language  = {en}
}