Surface Text based Dialogue Models for Virtual Humans Sudeep Gandhe author David Traum author 2013-08 text Proceedings of the SIGDIAL 2013 Conference Maxine Eskenazi editor Michael Strube editor Barbara Di Eugenio editor Jason D Williams editor Association for Computational Linguistics Metz, France conference publication gandhe-traum-2013-surface https://aclanthology.org/W13-4039/ 2013-08 251 260