1. Fundamentals of computer aided geometric design;Hoschek,1993
2. The NURBS book;Piegl,1995
3. Curves and surfaces for CAGD: a practical guide;Farin,2002
4. Advanced surface fitting techniques;Weiss;Computer Aided Geometric Design,2002
5. Constrained B-spline curve and surface fitting;Rogers;Computer-Aided Design,1989