@Book{SIGDIAL:2013,
  editor    = {Eskenazi, Maxine  and  Strube, Michael  and  Di Eugenio, Barbara  and  Williams, Jason D.},
  title     = {Proceedings of the SIGDIAL 2013 Conference},
  month     = {August},
  year      = {2013},
  address   = {Metz, France},
  publisher = {Association for Computational Linguistics},
  url       = {http://www.aclweb.org/anthology/W13-40}
}