@inproceedings{shirali2013seesay,
  author    = {Shirali-Shahreza, S. and Penn, G. and Balakrishnan, R. and Ganjali, Y.},
  title     = {{SeeSay} and {HearSay} {CAPTCHA}s for Mobile Interaction},
  booktitle = {Proceedings of the {SIGCHI} Conference on Human Factors in Computing Systems ({CHI} 2013)},
  address   = {Paris, France},
  month     = apr # {-{}-} # may,
  year      = {2013},
  pages     = {2147--2156},
  doi       = {10.1145/2470654.2481295},
  url       = {https://dl.acm.org/doi/10.1145/2470654.2481295},
  selected  = {true}
}