Extending the BLEU MT Evaluation Method with Frequency Weightings Bogdan Babych author Tony Hartley author 2004-07 text Proceedings of the 42nd Annual Meeting of the Association for Computational Linguistics (ACL-04) Barcelona, Spain conference publication babych-hartley-2004-extending 10.3115/1218955.1219034 https://aclanthology.org/P04-1079/ 2004-07 621 628