@ARTICLE{Li:JEI2006,
  author =       {Shujun Li and Chengqing Li and Kwok-Tung Lo and Guanrong Chen},
  title =        {Cryptanalysis of an image encryption scheme},
  journal =      {Journal of Electronic Imaging},
  year =         {2006},
  volume =       {15},
  number =       {4},
  pages =        {Article Number 043012},
  doi =          {10.1117/1.2360697},
  note =         {preprint available online at \url{http://www.hooklee.com/pub.html}},
}