@inproceedings{zens-etal-2004-improved,
    title = "Improved Word Alignment Using a Symmetric Lexicon Model",
    author = "Zens, Richard  and
      Matusov, Evgeny  and
      Ney, Hermann",
    booktitle = "{COLING} 2004: Proceedings of the 20th International Conference on Computational Linguistics",
    month = "aug 23–aug 27",
    year = "2004",
    address = "Geneva, Switzerland",
    publisher = "COLING",
    url = "https://preview.aclanthology.org/fix-sig-urls/C04-1006/",
    pages = "36--42"
}