@article{deepechostatenetworkdeepesnabrief,
  title = {Deep Echo State Network (DeepESN): A Brief Survey},
  author = {Claudio Gallicchio and Alessio Micheli},
  year = {2017},
  eprint = {1712.04323},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1712.04323v4},
}