Ciprian Borcea, Xavier Goaoc, Sylvain Petitjean. Line transversals to disjoint balls. In Jeff Erickson, editor, Proceedings of the 23rd ACM Symposium on Computational Geometry, Gyeongju, South Korea, June 6-8, 2007. pages 245-254, ACM, 2007. [doi]
Abstract is missing.