Joseph S. B. Mitchell. A PTAS for TSP with neighborhoods among fat regions in the plane. In Nikhil Bansal, Kirk Pruhs, Clifford Stein, editors, Proceedings of the Eighteenth Annual ACM-SIAM Symposium on Discrete Algorithms, SODA 2007, New Orleans, Louisiana, USA, January 7-9, 2007. pages 11-18, SIAM, 2007. [doi]
Abstract is missing.