@inproceedings{oouchida-etal-2004-context,
    title = "Context-free Approximation of {LTAG} towards {CFG} Filtering",
    author = "Oouchida, Kenta  and
      Yoshinaga, Naoki  and
      Tsujii, Jun{'}ichi",
    editor = "Rambow, Owen  and
      Stone, Matthew",
    booktitle = "Proceedings of the 7th International Workshop on Tree Adjoining Grammar and Related Formalisms",
    month = may,
    year = "2004",
    address = "Vancouver, Canada",
    publisher = "Simon Fraser University",
    url = "https://preview.aclanthology.org/fix-sig-urls/W04-3323/",
    pages = "171--177"
}