@inproceedings{Prautzsch2000AG<sup>1</sup>,
  Author = {Hartmut Prautzsch and Georg Umlauf},
  Title = {A G<sup>1</sup> and a G<sup>2</sup> subdivision schemes for triangular nets},
  Booktitle = {},
  Year = {2000},
  Note = {In: Int. J. Shape Modelling, 6(1): 21–35, 2000}
}