@inproceedings{ritchie-1986-computational,
    title = "The computational complexity of sentence derivation in functional unification grammar",
    author = "Ritchie, Graeme",
    booktitle = "Coling 1986 Volume 1: The 11th International Conference on Computational Linguistics",
    year = "1986",
    url = "https://preview.aclanthology.org/Add-Cong-Liu-Florida-Atlantic-University-author-id/C86-1137/"
}