1. The β-spline: A local representation based on shape parameters and on fundamental geometric measures;Barsky,1981
2. β-splines with a difference;Bartels,1985
3. Curvature continuous curves and surfaces;Boehm;Computer Aided Geometric Design,1985
4. A survey of curve and surface methods in CAGD;Boehm;Computer Aided Geometric Design,1984
5. Visually C2 cubic splines;Farin;CAD,1982