Julien Demouth, Olivier Devillers, Hazel Everett, Marc Glisse, Sylvain Lazard, Raimund Seidel. Between umbra and penumbra. In Jeff Erickson, editor, Proceedings of the 23rd ACM Symposium on Computational Geometry, Gyeongju, South Korea, June 6-8, 2007. pages 265-274, ACM, 2007. [doi]
Abstract is missing.