@inproceedings{ramsay-1989-extended,
    title = "Extended Graph Unification",
    author = "Ramsay, Allan",
    editor = "Somers, Harold  and
      McGee Wood, Mary",
    booktitle = "Fourth Conference of the {E}uropean Chapter of the Association for Computational Linguistics",
    month = apr,
    year = "1989",
    address = "Manchester, England",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/E89-1029/"
}