Jih-Fang Wang, Vernon Chi, Henry Fuchs. A real-time optical 3D tracker for head-mounted display systems. In Michael Zyda, editor, Proceedings of the 1990 symposium on Interactive 3D graphics, I3D '90, Snowbird, UT, USA, March 1990. pages 205-215, ACM, 1990. [doi]
Abstract is missing.