@misc{Quaisser1993,
  author    = {Quaisser, Erhard},
  title     = {Bonetti, F., Civolani, N., Centro Stampa Univ. degli Studi di Perugia, (1993), S. 113 - 131},
  year      = {1993},
  language  = {it}
}
@misc{Quaisser1993,
  author    = {Quaisser, Erhard},
  title     = {Steinke, G. F., Geometriae Dedicata, 48 (1993), S. 337 - 348},
  year      = {1993},
  language  = {de}
}
@misc{Quaisser1993,
  author    = {Quaisser, Erhard},
  title     = {Strambach, K., Centro Stampa Univ. degli Studi di Perugia, (1993), S. 21 - 24},
  year      = {1993},
  language  = {it}
}
@misc{Quaisser1993,
  author    = {Quaisser, Erhard},
  title     = {Kainen, P. C., Geombinatorics, 3 (1993), 1, S. 10 - 12},
  year      = {1993},
  language  = {de}
}