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.
Wayne Tiller, "Rational B-Splines for Curve and Surface Representation", IEEE Computer Graphics and Applications, vol.3, no. 6, pp. 61-69, September 1983, doi:10.1109/MCG.1983.263244