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2. “Tracing Surface Intersections,”;Bajaj;Computer Aided Geometric Design,1988
3. “Surfaces in CAGD: A Survey of New Results,”;Barnhill;Computer Aided Geometric Design,1985
4. “Superquadrics and Angle Preserving Transformations,”;Barr;Computer Graphics,1981
5. “Global and Local Deformations of Solid Primitives,”;Barr;Computer Graphics,1984