If you use this code for your research, please cite the paper this code is based on Bag-of-Words as Target for Neural Machine Translation:
@inproceedings{Ma2018bag,
title = {Bag-of-Words as Target for Neural Machine Translation},
author = {Shuming Ma and Xu Sun and Yizhong Wang and Junyang Lin},
booktitle = {{ACL} 2018},
year = {2018}
}