@article{penn-2000-book,
    title = "Book Reviews: The Mathematics of Syntactic Structure: Trees and their Logics",
    author = "Penn, Gerald",
    journal = "Computational Linguistics",
    volume = "26",
    number = "2",
    year = "2000",
    address = "Cambridge, MA",
    publisher = "MIT Press",
    url = "https://preview.aclanthology.org/fix-sig-urls/J00-2010/"
}