@inproceedings{och-etal-2001-efficient,
    title = "An Efficient {A}* Search Algorithm for Statistical Machine Translation",
    author = "Och, Franz Josef  and
      Ueffing, Nicola  and
      Ney, Hermann",
    booktitle = "Proceedings of the {ACL} 2001 Workshop on Data-Driven Methods in Machine Translation",
    year = "2001",
    url = "https://preview.aclanthology.org/fix-sig-urls/W01-1408/"
}