1. Boehm, W., and D. Hansford, Parametric representation of quadric surfaces, Math. Meth. and Num. Anal, to appear.
2. Boehm, W., and D. Hansford, Bézier patches on quadrics, in G. Farin, editor, Rational Curves and Surfaces, SIAM, Philadelphia, 1991, to appear.
3. Farin, G., Curves and Surfaces for Computer Aided Geometric Design, 2nd Edition, Academic Press, 1990.
4. The octant of a sphere as a nondegenerate triangular Bézier patch;Farin;Computer Aided Geom. Design,1987
5. Real Rational Curves are not “Unit Speed”;Farouki;Computer Aided Geom. Design,1991