@inproceedings{LascaridesAsher91,
  author	= {Lascarides, Alex and Asher, N.},
  year		= {1991},
  title		= {Discourse relations and defeasible knowledge},
  booktitle	= {Proceedings of the 29th. Annual Meeting of the Association for Computational Linguistics},
  pages		= {55--63},
  publisher	= {Association for Computational Linguistics},
  address	= {Berkeley, California}
}