@article{learninghierarchicalsparserepresentation,
  title = {Learning Hierarchical Sparse Representations using Iterative Dictionary Learning and Dimension Reduction},
  author = {Mohamad Tarifi and Meera Sitharam and Jeffery Ho},
  year = {2011},
  eprint = {1106.0357},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1106.0357v1},
}