@inproceedings{Prautzsch1998AG<sup>2</sup>subdivision,
  Author = {Hartmut Prautzsch and Georg Umlauf},
  Title = {A G<sup>2</sup>-subdivision algorithm},
  Booktitle = {},
  Year = {1998},
  Note = {In: G. Farin, H. Bieri, G. Brunnet, T. DeRose (eds.), Proceedings of the Dagstuhl conference on geometric modelling 1996, Computing suppl., 1998: 217–224}
}