A Systematic Comparison of Smoothing Techniques for Sentence-Level BLEU Boxing Chen author Colin Cherry author 2014-06 text Proceedings of the Ninth Workshop on Statistical Machine Translation Ondřej Bojar editor Christian Buck editor Christian Federmann editor Barry Haddow editor Philipp Koehn editor Christof Monz editor Matt Post editor Lucia Specia editor Association for Computational Linguistics Baltimore, Maryland, USA conference publication chen-cherry-2014-systematic 10.3115/v1/W14-3346 https://aclanthology.org/W14-3346/ 2014-06 362 367