1. Barnhill RE, Riesenfeld RF, editors. Computer aided geometric design. New York–San Francisco–London: Academic Press, 1974.
2. A survey of curve and surface methods in CAGD;Böhm;Computer Aided Geometric Design,1984
3. Geometric concepts for geometric design;Böhm,1994
4. Overhauser A. Analytic definition of curves and surfaces by parabolic blending. Technical report, Ford Motor Company, 1968.
5. Visual interaction with Overhauser curves and surfaces;Brewer;Computer Graphics,1977