Issue No. 06 - September (1983 vol. 3)
Wayne Tiller , Structural Dynamics Research Corporation
Nonuniform, rational B-splines, capable of representing both precise quadric primitives and free-form curves and surfaces, offer an efficient mathematical form for geometric modeling systems.
W. Tiller, "Rational B-Splines for Curve and Surface Representation," in IEEE Computer Graphics and Applications, vol. 3, no. , pp. 61-69, 1983.