1. B-splines without divided differences;de Boor,1987
2. Shape Mathematics and CAD, Part II;de Casteljau,1986
3. Explicit continuity conditions for adjacent Bézier surface patches;Degen;Computer Aided Geometric Design,1990
4. Curves and Surfaces for Computer Aided Geometric Design;Farin,1993
5. A simple look at polar forms;Kiciak;Computer Aided Geometric Design,2001