@InProceedings{ha-EtAl:2012:SIGDIAL2012,
  author    = {Ha, Eun Young  and  Grafsgaard, Joseph F.  and  Mitchell, Christopher  and  Boyer, Kristy Elizabeth  and  Lester, James C.},
  title     = {Combining Verbal and Nonverbal Features to Overcome the ``Information Gap'' in Task-Oriented Dialogue},
  booktitle = {Proceedings of the 13th Annual Meeting of the Special Interest Group on Discourse and Dialogue},
  month     = {July},
  year      = {2012},
  address   = {Seoul, South Korea},
  publisher = {Association for Computational Linguistics},
  pages     = {247--256},
  url       = {http://www.aclweb.org/anthology/W12-1634}
}