Valentin Polishchuk, Joseph S. B. Mitchell. Thick non-crossing paths and minimum-cost flows in polygonal domains. In Jeff Erickson, editor, Proceedings of the 23rd ACM Symposium on Computational Geometry, Gyeongju, South Korea, June 6-8, 2007. pages 56-65, ACM, 2007. [doi]
Abstract is missing.