@inproceedings{black-etal-1993-towards,
    title = "Towards History-based Grammars: Using Richer Models for Probabilistic Parsing",
    author = "Black, Ezra  and
      Jelinek, Fred  and
      Lafrerty, John  and
      Magerman, David M.  and
      Mercer, Robert  and
      Roukos, Salim",
    booktitle = "31st Annual Meeting of the Association for Computational Linguistics",
    month = jun,
    year = "1993",
    address = "Columbus, Ohio, USA",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/P93-1005/",
    doi = "10.3115/981574.981579",
    pages = "31--37"
}