@inproceedings{mann-mccallum-2007-efficient,
    title = "Efficient Computation of Entropy Gradient for Semi-Supervised Conditional Random Fields",
    author = "Mann, Gideon  and
      McCallum, Andrew",
    editor = "Sidner, Candace  and
      Schultz, Tanja  and
      Stone, Matthew  and
      Zhai, ChengXiang",
    booktitle = "Human Language Technologies 2007: The Conference of the North {A}merican Chapter of the Association for Computational Linguistics; Companion Volume, Short Papers",
    month = apr,
    year = "2007",
    address = "Rochester, New York",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/N07-2028/",
    pages = "109--112"
}