@misc{Richter1994,
  author    = {Richter, Martin},
  title     = {Anlagespiegel},
  year      = {1994},
  language  = {de}
}
@misc{Richter1994,
  author    = {Richter, Martin},
  title     = {Inventur},
  year      = {1994},
  language  = {de}
}
@misc{Richter1994,
  author    = {Richter, Martin},
  title     = {Gesch{\"a}ftsjahr},
  year      = {1994},
  language  = {de}
}