@InProceedings{birch-EtAl:2006:WMT,
  author    = {Birch, Alexandra  and  Callison-Burch, Chris  and  Osborne, Miles  and  Koehn, Philipp},
  title     = {Constraining the Phrase-Based, Joint Probability Statistical Translation Model},
  booktitle = {Proceedings on the Workshop on Statistical Machine Translation},
  month     = {June},
  year      = {2006},
  address   = {New York City},
  publisher = {Association for Computational Linguistics},
  pages     = {154--157},
  url       = {http://www.aclweb.org/anthology/W/W06/W06-3123}
}