Edmund Ihler, Gabriele Reich, Peter Widmayer. On Shortest Networks for Classes of Points in the Plane. In Hanspeter Bieri, Hartmut Noltemeier, editors, Computational Geometry - Methods, Algorithms and Applications, International Workshop on Computational Geometry CG 91, Bern, Switzerland, March 21-22, 1991. Volume 553 of Lecture Notes in Computer Science, pages 103-111, Springer, 1991.
Abstract is missing.