1. Variable radius blending using Dupin cyclides;Chandru,1990
2. Surface Modeling for CAD/CAM;Choi,1991
3. Variable-radius blending of parametric surfaces;Chuang;The Visual Computer,1995
4. Precise parametric evaluation of variable radius blend surfaces;Denker,1996
5. Variable-radius blends and Dupin cyclides;Dutta,1989