@InProceedings{papineni-EtAl:2002:ACL,
  author    = {Kishore Papineni  and  Salim Roukos  and  Todd Ward  and  Wei-Jing Zhu},
  title     = {Bleu: a Method for Automatic Evaluation of Machine Translation},
  booktitle = {Proceedings of 40th Annual Meeting of the Association for Computational Linguistics},
  month     = {July},
  year      = {2002},
  address   = {Philadelphia, Pennsylvania, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {311--318},
  url       = {http://www.aclweb.org/anthology/P02-1040},
  doi       = {10.3115/1073083.1073135}
}