@article{hierarchicalprinciplesofembodied,
  title = {Hierarchical principles of embodied reinforcement learning: A review},
  author = {Manfred Eppe and Christian Gumbsch and Matthias Kerzel and Phuong D. H. Nguyen and Martin V. Butz and Stefan Wermter},
  year = {2020},
  eprint = {2012.10147},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2012.10147v2},
}