@misc{Quaisser1992,
  author    = {Quaisser, Erhard},
  title     = {Woodall, D., Geombinatorics, 1 (1992), 4, S. 18 - 20},
  year      = {1992},
  language  = {de}
}
@misc{Quaisser1992,
  author    = {Quaisser, Erhard},
  title     = {Zeitler, H., Mathematische Semesterberichte, 39 (1992), S. 163 - 183},
  year      = {1992},
  language  = {de}
}