1. Numerische Methoden 1;Beresin,1970
2. Link between Bézier and Lagrange curve and surface schemes;Farin;Computer-Aided Design,1986
3. Curves and Surfaces for Computer Aided Design;Farin,1990
4. Grundlagen der geometrischen Datenverarbeitung, 2;Hoschek,1992
5. Approximation by Spline Functions;Nürnberger,1989