The Utility of a Graphical Representation of Discourse Structure in Spoken Dialogue Systems Mihai Rotaru author Diane Litman author 2007-06 text Proceedings of the 45th Annual Meeting of the Association of Computational Linguistics Annie Zaenen editor Antal van den Bosch editor Association for Computational Linguistics Prague, Czech Republic conference publication rotaru-litman-2007-utility https://aclanthology.org/P07-1046/ 2007-06 360 367