Hans L. Bodlaender, Pål Grønås Drange, Markus S. Dregi, Fedor V. Fomin, Daniel Lokshtanov, Michal Pilipczuk. An O(c^k n) 5-Approximation Algorithm for Treewidth. In 54th Annual IEEE Symposium on Foundations of Computer Science, FOCS 2013, 26-29 October, 2013, Berkeley, CA, USA. pages 499-508, IEEE Computer Society, 2013. [doi]
Abstract is missing.