@InProceedings{crook-granell-pulman:2009:SIGDIAL,
  author    = {Crook, Nigel  and  Granell, Ramon  and  Pulman, Stephen},
  title     = {Unsupervised Classification of Dialogue Acts using a {D}irichlet Process Mixture Model},
  booktitle = {Proceedings of the SIGDIAL 2009 Conference},
  month     = {September},
  year      = {2009},
  address   = {London, UK},
  publisher = {Association for Computational Linguistics},
  pages     = {341--348},
  url       = {http://www.aclweb.org/anthology/W09-3951}
}