@article{JMLR:v15:sheikh14a,
  author  = {Abdul-Saboor Sheikh and Jacquelyn A. Shelton and J{{\"o}}rg L{{\"u}}cke},
  title   = {A Truncated EM Approach for Spike-and-Slab Sparse Coding},
  journal = {Journal of Machine Learning Research},
  year    = {2014},
  volume  = {15},
  number  = {77},
  pages   = {2653--2687},
  url     = {http://jmlr.org/papers/v15/sheikh14a.html}
}