@inproceedings{machinelearningbytwodimensional,
  title = {Machine Learning by Unitary Tensor Network of Hierarchical Tree Structure},
  author = {Ding Liu and Shi-Ju Ran and Peter Wittek and Cheng Peng and Raul Blázquez García and Gang Su and Maciej Lewenstein},
  year = {2017},
  booktitle = {ICLR 2018 1},
  eprint = {1710.04833},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1710.04833v4},
}