@inproceedings{shirali2009spoken,
  author    = {Shirali-Shahreza, S. and Abolhassani, H. and Sameti, H. and Shirali-Shahreza, M.H.},
  title     = {Spoken {CAPTCHA}: A {CAPTCHA} System for Blind Users},
  booktitle = {Proceedings of the 2009 ISECS International Colloquium on Computing, Communication, Control, and Management (CCCM 2009)},
  address   = {Sanya, China},
  month     = aug,
  year      = {2009},
  volume    = {1},
  pages     = {221--224},
  doi		= {10.1109/CCCM.2009.5270464}
}