@Book{TextGraphs-6:2011,
  editor    = {Irina Matveeva  and  Alessandro Moschitti  and  Lluís Màrquez  and  Fabio Massimo Zanzotto},
  title     = {Proceedings of TextGraphs-6: Graph-based Methods for Natural Language Processing},
  month     = {June},
  year      = {2011},
  address   = {Portland, Oregon},
  publisher = {Association for Computational Linguistics},
  url       = {http://www.aclweb.org/anthology/W11-11},
}