@inproceedings{florencio-2003-rigid,
    title = "Rigid grammars in the Associative-Commutative {L}ambek Calculus are not learnable",
    author = "Florencio, Christophe Costa",
    editor = "Copestake, Ann  and
      Haji{\v{c}}, Jan",
    booktitle = "10th Conference of the {E}uropean Chapter of the Association for Computational Linguistics",
    month = apr,
    year = "2003",
    address = "Budapest, Hungary",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/E03-1033/"
}