@inproceedings{harbusch-1990-constraining,
    title = "Constraining {T}ree {A}djoining {G}rammars by Unification",
    author = "Harbusch, Karin",
    booktitle = "{COLING} 1990 Volume 2: Papers presented to the 13th International Conference on Computational Linguistics",
    year = "1990",
    url = "https://preview.aclanthology.org/fix-sig-urls/C90-2029/"
}