@InProceedings{zens-ney:2003:ACL,
  author    = {Richard Zens  and  Hermann Ney},
  title     = {A Comparative Study on Reordering Constraints in Statistical Machine Translation},
  booktitle = {Proceedings of the 41st Annual Meeting of the Association for Computational Linguistics},
  month     = {July},
  year      = {2003},
  address   = {Sapporo, Japan},
  publisher = {Association for Computational Linguistics},
  pages     = {144--151},
  url       = {http://www.aclweb.org/anthology/P03-1019},
  doi       = {10.3115/1075096.1075115}
}