Parametric representation of quadric surfaces
ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Volume 26 (1992) no. 1, p. 191-200 
@article{M2AN_1992__26_1_191_0,
     author = {Boehm, W. and Hansford, D.},
     title = {Parametric representation of quadric surfaces},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique},
     publisher = {Dunod},
     volume = {26},
     number = {1},
     year = {1992},
     pages = {191-200},
     zbl = {0766.65011},
     mrnumber = {1155007},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1992__26_1_191_0}
}

Boehm, W.; Hansford, D. Parametric representation of quadric surfaces. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Volume 26 (1992) no. 1, pp. 191-200. http://www.numdam.org/item/M2AN_1992__26_1_191_0/

[1] W. Boehm, On Cubics : A Survey. Comput. Graph. Image Process. 19 (1982) pp. 201-226. | Zbl 0534.65095

[2] W. Boehm, G. Farin and J. Kahmann, A survey of curve and surface methods in CAGD. Comput. Aided Geom. Design, 1 (1984) pp. 1-60. | Zbl 0604.65005

[3] W. Boehm and D. Hansford, Bézier Patches on Quadrics, in G. Farin, editor, NURBS for Curve and Surface Design, SIAM, Philadelphia (1991) pp. 1-14. | MR 1133460 | Zbl 0760.68087

[4] G. Farin, Curves and Surfaces for Computer Aided Geometric Design. Academic Press, 1988, 2nd Edition 1990. | MR 974109 | Zbl 0694.68004

[5] G. Farin, B. Piper and A. Worsey, The octant of a sphere as a non-degenerate triangular Bézier patch. Comput. Aided Geom. Design, 4 (1987) pp. 329-332. | MR 937371 | Zbl 0646.41011

[6] G. Geise and U. Langbecker, Finite quadrics segments with four conic boundary curves. Comput. Aided Geom. Design 7 (1990) pp. 141-150. | MR 1074604 | Zbl 0716.65012

[7] E. Lee, The rational Bézier representation for conics, in G. Farin, editor, Geometric Modeling : Algorithms and New Trends, SIAM, Philadelphia (1987) pp. 3-19. | MR 936441

[8] J. Niebuhr, B-patches on Quadrics. Dissertation TU Braunschweig, to be published in 1991 (in German).

[9] T. Sederberg, Implicit curves and surfaces. Ph. D. Thesis, Purdue, 1983.

[10] T. Sederberg and D. Anderson, Steiner surface patches. IEEE CG&A, May (1985).

[11] D. Struik, Lectures on Analytic and Projective Geometry. Addison-Wesley, 1953. | MR 57552 | Zbl 0053.28701