Stanley E. Scharoff, Alex Pentland, Irfan A. Essa, Martin Friedmann, Bradley Horowitz. The ThingWorld modeling system: virtual sculpting by modal forces. In Michael Zyda, editor, Proceedings of the 1990 symposium on Interactive 3D graphics, I3D '90, Snowbird, UT, USA, March 1990. pages 143-144, ACM, 1990. [doi]
Abstract is missing.