@InProceedings{boyer-EtAl:2009:NLP-Education,
  author    = {Boyer, Kristy Elizabeth  and  Ha, Eun Young  and  Phillips, Robert  and  Wallis, Michael  and  Vouk, Mladen  and  Lester, James},
  title     = {Inferring Tutorial Dialogue Structure with Hidden Markov Modeling},
  booktitle = {Proceedings of the Fourth Workshop on Innovative Use of NLP for Building Educational Applications},
  month     = {June},
  year      = {2009},
  address   = {Boulder, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {19--26},
  url       = {http://www.aclweb.org/anthology/W09-2103}
}