Parinya Chalermsook, Syamantak Das, Bundit Laekhanukit, Daniel Vaz. Beyond Metric Embedding: Approximating Group Steiner Trees on Bounded Treewidth Graphs. In Philip N. Klein, editor, Proceedings of the Twenty-Eighth Annual ACM-SIAM Symposium on Discrete Algorithms, SODA 2017, Barcelona, Spain, Hotel Porta Fira, January 16-19. pages 737-751, SIAM, 2017. [doi]
Abstract is missing.