MohammadHossein Bateni, MohammadTaghi Hajiaghayi, Dániel Marx. Approximation schemes for steiner forest on planar graphs and graphs of bounded treewidth. In Leonard J. Schulman, editor, Proceedings of the 42nd ACM Symposium on Theory of Computing, STOC 2010, Cambridge, Massachusetts, USA, 5-8 June 2010. pages 211-220, ACM, 2010. [doi]
Abstract is missing.