The Operation Sequence Model—Combining N-Gram-Based and Phrase-Based Statistical Machine Translation Nadir Durrani author Helmut Schmid author Alexander Fraser author Philipp Koehn author Hinrich Schütze author 2015-06 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal durrani-etal-2015-operation 10.1162/COLI_a_00218 https://aclanthology.org/J15-2001/ 2015-06 41 2 157 186