@Inproceedings{coates2011analysis,
  author = {Coates, A. and Lee, H. and Ng, A.Y.},
  title  = {An analysis of single-layer networks in unsupervised feature learning},

  year   = {2011},
  number = {},
  url    = {http://jmlr.csail.mit.edu/proceedings/papers/v15/coates11a.html},

  const  = {\ text}
}
@Inproceedings{coates2011detection,
  author = {Coates, A. and Carpenter, B. and Case, C. and Satheesh, S. and Suresh, B. and Wang, Tao and Wu, D.J. and Ng, A.Y.},
  title  = {Text Detection and Character Recognition in Scene Images with Unsupervised Feature Learning},

  year   = {2011},
  number = {},
  url    = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6065350&tag=1},
  doi = {10.1109/ICDAR.2011.95},
  const  = {\ text}
}