@inproceedings{normalizeddirectionpreservingadam,
  title = {Normalized Direction-preserving Adam},
  author = {Zijun Zhang and Lin Ma and Zongpeng Li and Chuan Wu},
  year = {2017},
  booktitle = {ICLR 2018 1},
  eprint = {1709.04546},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1709.04546v2},
}