Qingde Li, Roger Phillips. Implicit curve and surface design using smooth unit step functions. In Gershon Elber, Nicholas M. Patrikalakis, Pere Brunet, editors, Proceedings of the Ninth ACM Symposium on Solid Modeling and Applications, Genova, Italy, June 09-11, 2004. pages 237-242, ACM, 2004. [doi]
Abstract is missing.