@inproceedings{bach-etal-2009-source,
    title = "Source-side Dependency Tree Reordering Models with Subtree Movements and Constraints",
    author = "Bach, Nguyen  and
      Gao, Qin  and
      Vogel, Stephan",
    booktitle = "Proceedings of Machine Translation Summit XII: Papers",
    month = aug # " 26-30",
    year = "2009",
    address = "Ottawa, Canada",
    url = "https://aclanthology.org/2009.mtsummit-papers.1",
}