1. Consurf I-III;Ball;CAD,1974
2. Consurf I-III;Ball;CAD,1975
3. Consurf I-III;Ball;CAD,1977
4. Determining a set of B-spline control vertices to generate an interpolating surface;Barsky,1980
5. End conditions and boundary conditions for uniform B-spiine curve and surface representations;Barsky;Comp. in Indus.,1982