@inproceedings{bhat-sproat-2009-knowing,
    title = "Knowing the Unseen: Estimating Vocabulary Size over Unseen Samples",
    author = "Bhat, Suma  and
      Sproat, Richard",
    editor = "Su, Keh-Yih  and
      Su, Jian  and
      Wiebe, Janyce  and
      Li, Haizhou",
    booktitle = "Proceedings of the Joint Conference of the 47th Annual Meeting of the {ACL} and the 4th International Joint Conference on Natural Language Processing of the {AFNLP}",
    month = aug,
    year = "2009",
    address = "Suntec, Singapore",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/P09-1013/",
    pages = "109--117"
}