An Information-State Approach to Collaborative Reference David DeVault author Natalia Kariaeva author Anubha Kothari author Iris Oved author Matthew Stone author 2005-06 text Proceedings of the ACL Interactive Poster and Demonstration Sessions Masaaki Nagata editor Ted Pedersen editor Association for Computational Linguistics Ann Arbor, Michigan conference publication devault-etal-2005-information 10.3115/1225753.1225754 https://aclanthology.org/P05-3001/ 2005-06 1 4