Soheil Danesh, Tamara Sumner, James H. Martin. SGRank: Combining Statistical and Graphical Methods to Improve the State of the Art in Unsupervised Keyphrase Extraction. In Martha Palmer, Gemma Boleda, Paolo Rosso, editors, Proceedings of the Fourth Joint Conference on Lexical and Computational Semantics, *SEM 2015, June 4-5, 2015, Denver, Colorado, USA. pages 117-126, The *SEM 2015 Organizing Committee, 2015. [doi]