@inproceedings{PulmanNaturalLanguage,
  title = "A Natural Language Interface to an Intelligent Planning System",
  author = "B. Crabtree and R. Crouch and D. Moffat and N. Pirie and S. G. Pulman and G. D. Ritchie and A. Tate",
  year = "1988",
  address = "Stevenage",
  booktitle = "{UK IT} 88 Conference Publication, Dept. of Trade and Industry",
  pages = "319--322",
  publisher = "{IEE Publishing Dept}",
}