@inproceedings{Bangert1997Quadric,
  Author = {Claudia Bangert and Hartmut Prautzsch},
  Title = {Quadric splines},
  Booktitle = {Tagungsbericht der Konferenz "107 Jahre Drehfluchtprinzip"},
  Year = {1997},
  Editor = {Mick and R{"o}schel and Vogler},
  Address = {Vorau, Austria}
}