@inproceedings{he-2007-using,
    title = "Using Word-Dependent Transition Models in {HMM}-Based Word Alignment for Statistical Machine Translation",
    author = "He, Xiaodong",
    editor = "Callison-Burch, Chris  and
      Koehn, Philipp  and
      Fordyce, Cameron Shaw  and
      Monz, Christof",
    booktitle = "Proceedings of the Second Workshop on Statistical Machine Translation",
    month = jun,
    year = "2007",
    address = "Prague, Czech Republic",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest_wac_2008/W07-0711/",
    pages = "80--87"
}