1. The Beta-Spline: A Local Representation based on Shape Parameters and Fundamental Geometric Measures;Barsky,1981
2. Varying the Betas in Beta-Splines;Barsky,1982
3. An Introduction to the Use of Splines in Computer Graphics;Bartels,1983
4. Interpolatory and variation-diminishing properties of generalized B-splines;Goodman,1984