@inbook{PulmanNaturalLanguageProcessing,
  title = "Natural Language Processing for Requirements Specification",
  author = "B. Macias and S. G. Pulman",
  year = "1993",
  address = "London",
  booktitle = "Safety Critical Systems: Current Issues, Techniques and Standards",
  editor = "F. Redmill and T. Anderson",
  pages = "67--89",
  publisher = "{Chapman and Hall Ltd.}",
}