@inproceedings{niemi-koskenniemi-2007-representing,
    title = "Representing Calendar Expressions with Finite-State Transducers that Bracket Periods of Time on a Hierachical Timeline",
    author = "Niemi, Jyrki  and
      Koskenniemi, Kimmo",
    editor = "Nivre, Joakim  and
      Kaalep, Heiki-Jaan  and
      Muischnek, Kadri  and
      Koit, Mare",
    booktitle = "Proceedings of the 16th Nordic Conference of Computational Linguistics ({NODALIDA} 2007)",
    month = may,
    year = "2007",
    address = "Tartu, Estonia",
    publisher = "University of Tartu, Estonia",
    url = "https://preview.aclanthology.org/fix-sig-urls/W07-2457/",
    pages = "355--362"
}