Mixture Model POMDPs for Efficient Handling of Uncertainty in Dialogue Management James Henderson author Oliver Lemon author 2008-06 text Proceedings of ACL-08: HLT, Short Papers Johanna D Moore editor Simone Teufel editor James Allan editor Sadaoki Furui editor Association for Computational Linguistics Columbus, Ohio conference publication henderson-lemon-2008-mixture https://aclanthology.org/P08-2019/ 2008-06 73 76