Robert Fraser, Meng He, Akitoshi Kawamura, Alejandro López-Ortiz, J. Ian Munro, Patrick K. Nicholson. The Distance 4-Sector of Two Points Is Unique. In Leizhen Cai, Siu-Wing Cheng, Tak Wah Lam, editors, Algorithms and Computation - 24th International Symposium, ISAAC 2013, Hong Kong, China, December 16-18, 2013, Proceedings. Volume 8283 of Lecture Notes in Computer Science, pages 612-622, Springer, 2013. [doi]
Abstract is missing.