@misc{Quaisser1996,
  author    = {Quaisser, Erhard},
  title     = {Greewell, D. ; Johnson, P. D., Geombinatorics,2 (1993), 3, S. 61 - 64},
  year      = {1996},
  language  = {en}
}
@misc{Quaisser1996,
  author    = {Quaisser, Erhard},
  title     = {Antoni, C. ; Dalena, A., Discrete applied mathematics, 66 (1996), S. 75 - 79},
  year      = {1996},
  language  = {en}
}
@misc{Klotzek1996,
  author    = {Klotzek, Benno},
  title     = {Chandehari, M., Self-Circumference of rotors},
  year      = {1996},
  language  = {en}
}