1. Numerical control-mathematics and applications;Bezier,1972
2. A generalization of the Bernstein-Bezier method;Piegl;Comput.-Aided Des.,1984
3. Courbes et surfaces a poles;de Casteljau,1959
4. A theoretical development for the computer generation and display of piecewise polynomial surfaces;Lane;IEEE Trans PAMI,1980
5. Piegl, L ‘Representation of quadric primitives by rational polynomials’ to appear in Barnhill, R E and Böhm, W (eds)Surfaces in CAGD, North-Holland, Amsterdam