@incollection{Webber81-reference,
  author	= {Webber, Bonnie L.},
  editor	= {Webber, Bonnie L. and Joshi, Aravind K. and Sag, Ivan A.},
  year		= {1981},
  title		= {Discourse model synthesis: preliminaries to reference},
  year		= {1981},
  booktitle	= {Elements of Discourse Processing},
  publisher	= {Cambridge University Press},
  address	= {New York},
  pages		= {283--299}
}