@inproceedings{sparsefiltering,
  title = {Sparse Filtering},
  author = {Jiquan Ngiam and Zhenghao Chen and Sonia A. Bhaskar and Pang W. Koh and Andrew Y. Ng},
  year = {2011},
  booktitle = {NeurIPS 2011 12},
  url = {http://papers.nips.cc/paper/4334-sparse-filtering},
}