@inproceedings{sanchez-saez-etal-2009-statistical,
    title = "Statistical Confidence Measures for Probabilistic Parsing",
    author = "S{\'a}nchez-S{\'a}ez, Ricardo  and
      S{\'a}nchez, Joan-Andreu  and
      Bened{\'i} Ru{\'i}z, Jos{\'e}-Miguel",
    editor = "Angelova, Galia  and
      Mitkov, Ruslan",
    booktitle = "Proceedings of the International Conference {RANLP}-2009",
    month = sep,
    year = "2009",
    address = "Borovets, Bulgaria",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/R09-1070/",
    pages = "388--392"
}