@inproceedings{NovickSutton94,
  author	= {Novick, David G. and Sutton, Stephen},
  year		= {1994},
  title		= {An empirical model of acknowledgment for spoken-language systems},
  booktitle	= {32nd. Annual Meeting of the Association for Computational Linguistics},
  pages		= {96--101},
  address	= {New Mexico State University, Las Cruces, New Mexico}
}