@article{hayes-mouradian-1981-flexible,
    title = "Flexible Parsing",
    author = "Hayes, Philip J.  and
      Mouradian, George V.",
    journal = "American Journal of Computational Linguistics",
    volume = "7",
    number = "4",
    year = "1981",
    url = "https://aclanthology.org/J81-4002",
    pages = "232--242",
}