@article{Wahlster78,
  author	= {Jameson, A. Wahlster, W., and Hoeppner, W.},
  year		= {1978},
  title		= {Glancing, Referring, and Explaining in the Dialogue System HAM-RPM},
  journal	= {American Journal of Computational Linguistics},
  note		= {Microfiche 77, 53 - 67}
}