1. B.A. Barsky, The Beta-Spline: A Local Representation Based on Shape Parameters and Fundamental Geometric Measures, Ph.D. Thesis, 1981.
2. Computer Graphics and Geometric Modeling Using Beta-Splines;Barsky,1988
3. Local control of bias and tension in beta-splines;Barsky,1983
4. Curvature continuous curves and surfaces;Boehm;Computer Aided Geometric Design,1985
5. Rational geometric splines;Boehm;Computer Aided Geometric Design,1987