@InProceedings{fadaee-monz:2018:EMNLP, author = {Fadaee, Marzieh and Monz, Christof}, title = {Back-Translation Sampling by Targeting Difficult Words in Neural Machine Translation}, booktitle = {Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing}, month = {October-November}, year = {2018}, address = {Brussels, Belgium}, publisher = {Association for Computational Linguistics}, pages = {436--446}, abstract = {Neural Machine Translation has achieved state-of-the-art performance for several language pairs using a combination of parallel and synthetic data.}, url = {http://www.aclweb.org/anthology/D18-1040} }