A Statistical Approach to Machine Translation Peter F Brown author John Cocke author Stephen A Della Pietra author Vincent J Della Pietra author Fredrick Jelinek author John D Lafferty author Robert L Mercer author Paul S Roossin author 1990 text journal article Computational Linguistics continuing periodical academic journal brown-etal-1990-statistical https://aclanthology.org/J90-2002/ 1990 16 2 79 85