Spike-and-Slab Sparse Coding for Unsupervised Feature Discovery. Goodfellow, I. J., Courville, A., & Bengio, Y. In NIPS Workshop on Challenges in Learning Hierarchical Models, 2011.
bibtex   
@INPROCEEDINGS{goodfellow2011,
author = {Goodfellow, Ian J. and Courville, Aaron and Bengio, Yoshua},
title = {Spike-and-Slab Sparse Coding for Unsupervised Feature Discovery},
booktitle = {NIPS Workshop on Challenges in Learning Hierarchical Models},
year = {2011}
}

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