@inproceedings{CohenPerrault75,
  author	= {Cohen, P. R. and Perrault, C. R.},
  month		= aug,
  year		= {1977},
  title		= {Overview of `planning speech acts'},
  booktitle	= {Proceedings of the Fifth International Joint Conference on Artificial Intelligence},
  publisher	= {Massachusetts Institute of Technology}
}