@article{Bobrow77,
  author	= {Bobrow, D. G. and Kaplan, R. M. and Kay, M. and Norman, D. A. and Thompson, H. and Winograd, T.},
  year		= {1977},
  title		= {GUS: a Frame-Driven Dialog System},
  journal	= {Artificial Intelligence},
  volume	= {8},
  pages		= {155--173}
}