M. Walker, D. Litman, C. Kamm, and A. Abella. Proceedings of the eighth conference on European chapter of the Association for Computational Linguistics
, page 271--280. Morristown, NJ, USA, Association for Computational Linguistics, (1997)
S. van Mulken, E. Andr&\#233;, and J. M&\#252;ller. Proceedings of the HCI International '99 (the 8th International Conference on Human-Computer Interaction) on Human-Computer Interaction
, page 152--156. Mahwah, NJ, USA, Lawrence Erlbaum Associates, Inc., (1999)
Y. Moon. CHI '98: Proceedings of the SIGCHI conference on Human factors in computing systems
, page 103--108. New York, NY, USA, ACM Press/Addison-Wesley Publishing Co., (1998)
P. Andrews, S. Manandhar, and M. Boni. Proceedings of the 9th SIGdial Workshop on Discourse and Dialogue
, page 138--147. Columbus, Ohio, Association for Computational Linguistics, (June 2008)