1. A new twist for CAGD;Barnhill;Computer Graphics and Image Processing,1978
2. Twists, curvatures and surface interrogation;Barnhill;Computer Aided Design,1988
3. Surface-surface intersection;Barnhill;Comput. Aided Geom. Design,1987
4. Barnhill, R. E. and S. N. Kersey, Two general methods for surface-surface intersection, preprint.
5. Barnhill, R. E. and S. H. Watson, Geometry processing: numerical multiple integration, in Mathematics of Surfaces III, Oxford University Press, to appear.