Binhai Zhu, Chung Keung Poon. Efficient Approximation Algorithms for Multi-label Map Labeling. In Alok Aggarwal, C. Pandu Rangan, editors, Algorithms and Computation, 10th International Symposium, ISAAC 99, Chennai, India, December 16-18, 1999, Proceedings. Volume 1741 of Lecture Notes in Computer Science, pages 143-152, Springer, 1999. [doi]
Abstract is missing.