@inproceedings{kamigaito-etal-2014-unsupervised,
    title = "Unsupervised Word Alignment Using Frequency Constraint in Posterior Regularized {EM}",
    author = "Kamigaito, Hidetaka  and
      Watanabe, Taro  and
      Takamura, Hiroya  and
      Okumura, Manabu",
    editor = "Moschitti, Alessandro  and
      Pang, Bo  and
      Daelemans, Walter",
    booktitle = "Proceedings of the 2014 Conference on Empirical Methods in Natural Language Processing ({EMNLP})",
    month = oct,
    year = "2014",
    address = "Doha, Qatar",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/D14-1017/",
    doi = "10.3115/v1/D14-1017",
    pages = "153--158"
}