@article{anselmi2013unsupervised,
  title={Unsupervised Learning of Invariant Representations in Hierarchical Architectures},
  author={Anselmi, Fabio and Leibo, Joel Z and Rosasco, Lorenzo and Mutch, Jim and Tacchetti, Andrea and Poggio, Tomaso},
  journal={arXiv preprint arXiv:1311.4158},
  year={2013}
}