@article{seo-simmons-1989-syntactic,
    title = "Syntactic Graphs: A Representation for the Union of All Ambiguous Parse Trees",
    author = "Seo, Jungyun  and
      Simmons, Robert F.",
    journal = "Computational Linguistics",
    volume = "15",
    number = "1",
    year = "1989",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/J89-1002/",
    pages = "19--32"
}