@inbook{PulmanUnification,
  title = "Unification Based Syntactic Analysis",
  author = "S. G. Pulman",
  year = "1992",
  address = "Cambridge Mass.",
  booktitle = "{The Core Language Engine}",
  editor = "H. Alshawi",
  pages = "61--82",
  publisher = "{MIT Press.}",
}