@inproceedings{Clancey79,
  author	= {Clancey, W. J.},
  month		= aug,
  year		= {1979},
  title		= {Dialogue management for rule-based tutorials},
  booktitle	= {Proceedings of the Sixth International Joint Conference on Artificial Intelligence},
  pages		= {155--161},
  address	= {Tokyo}
}