@inproceedings{umemura-church-2000-empirical,
    title = "Empirical Term Weighting and Expansion Frequency",
    author = "Umemura, Kyoji  and
      Church, Kenneth W.",
    booktitle = "2000 Joint {SIGDAT} Conference on Empirical Methods in Natural Language Processing and Very Large Corpora",
    month = oct,
    year = "2000",
    address = "Hong Kong, China",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/W00-1315/",
    doi = "10.3115/1117794.1117809",
    pages = "117--123"
}