John P. Warder. Parallel Tangency R:::3:::. In Ralph R. Martin, Malcolm A. Sabin, Joab R. Winkler, editors, Mathematics of Surfaces XII, 12th IMA International Conference, Sheffield, UK, September 4-6, 2007, Proceedings. Volume 4647 of Lecture Notes in Computer Science, pages 465-479, Springer, 2007. [doi]
Abstract is missing.