@inproceedings{gao-etal-2011-soft,
    title = "Soft Dependency Constraints for Reordering in Hierarchical Phrase-Based Translation",
    author = "Gao, Yang  and
      Koehn, Philipp  and
      Birch, Alexandra",
    booktitle = "Proceedings of the 2011 Conference on Empirical Methods in Natural Language Processing",
    month = jul,
    year = "2011",
    address = "Edinburgh, Scotland, UK.",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/D11-1079",
    pages = "857--868",
}