@Book{SIGDIAL:2009,
  editor    = {Healey, Patrick G. T.   and  Pieraccini, Roberto  and Byron, Donna and Young, Steve and Purver, Matthew},
  title     = {Proceedings of the SIGDIAL 2009 Conference},
  month     = sep,
  year      = 2009,
  address   = {London, UK},
  publisher = {Association for Computational Linguistics},
  url       = {http://www.aclweb.org/anthology/W09-39},
  annote = "ISBN 978-1-932432-64-0",
  isbn = "978-1-932432-64-0",
  doi       = "10.18653/v1/W09-39",
  url       = "http://dx.doi.org/10.18653/v1/P07-2027",
}