@inproceedings{chen-etal-2011-unpacking,
    title = "Unpacking and Transforming Feature Functions: New Ways to Smooth Phrase Tables",
    author = "Chen, Boxing  and
      Kuhn, Roland  and
      Foster, George  and
      Johnson, Howard",
    booktitle = "Proceedings of Machine Translation Summit XIII: Papers",
    month = sep # " 19-23",
    year = "2011",
    address = "Xiamen, China",
    url = "https://preview.aclanthology.org/Author-page-Marten-During-lu/2011.mtsummit-papers.30/"
}