@inproceedings{Prautzsch1999Triangular, Author = {Hartmut Prautzsch and Georg Umlauf}, Title = {Triangular G2-splines}, Booktitle = {}, Year = {1999}, Note = {In: P.-L. Laurent, P. Sablonniere, L. L. Schumaker (eds.), Curve and Surface Design, Vanderbilt University Press, 1999: 335–342} }