@InProceedings{graa-EtAl:2018:WMT,
  author    = {Graça, Miguel  and  Kim, Yunsu  and  Schamper, Julian  and  Geng, Jiahui  and  Ney, Hermann},
  title     = {The RWTH Aachen University English-German and German-English Unsupervised Neural Machine Translation Systems for WMT 2018},
  booktitle = {Proceedings of the Third Conference on Machine Translation: Shared Task Papers},
  month     = {October},
  year      = {2018},
  address   = {Belgium, Brussels},
  publisher = {Association for Computational Linguistics},
  pages     = {377--385},
  url       = {http://www.aclweb.org/anthology/W18-6409}
}