1. Curves and Surfaces for Computer Aided Geometric Design;Farin,2001
2. Approximation with aesthetic constraints;Burchardt,1994
3. Curvature and the fairness of curves and surfaces;Farin;IEEE Comput Graph Appl,1989
4. Differential Geometry of Curves and Surfaces;do Carmo,1976
5. Detecting regions with undesirable curvature;Hoschek;Comput Aided Geom Design,1984