1. The beta-spline: A local representation based on shape parameters and fundamental geometric measures;Barsky,1981
2. Geometric continuity of parametric curves;Barsky,1984
3. Curvature continuous curves and surfaces;Boehm;Computer Aided Geometric Design,1985
4. Smooth curves and surfaces;Boehm;Farin '87,1987
5. Rational geometric splines;Boehm;Computer Aided Geometric Design,1987