@techreport{PulmanTR1985,
  title = "Indexed Grammars and Intersecting Dependencies",
  author = "Stephen Pulman and G. D. Ritchie",
  year = "1985",
  institution = "{University of East Anglia}",
  number = "23",
  pages = "21--38",
  series = "{Univ. of East Anglia Papers in Linguistics}",
}