Miroslav Trajkovic, Mark Hedley. The Eigenspace Method for Rigid Motion Recovery from less than Eight Point Correspondences. In Roland T. Chin, Ting-Chuen Pong, editors, Computer Vision - ACCV 98, Third Asian Conference on Computer Vision, Hong Kong, China, January 8-10, 1998, Proceedings, Volume II. Volume 1352 of Lecture Notes in Computer Science, pages 392-399, Springer, 1998.