@InProceedings{freedman:2000:ANLP,
  author    = {Reva Freedman},
  title     = {Plan-Based Dialogue Management in a Physics Tutor},
  booktitle = {Proceedings of the Sixth Conference on Applied Natural Language Processing},
  month     = {April},
  year      = {2000},
  address   = {Seattle, Washington, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {52--59},
  url       = {http://www.aclweb.org/anthology/A00-1008},
  doi       = {10.3115/974147.974155}
}