@inproceedings{shirali2006drawing,
  author    = {M. Shirali-Shahreza and S. Shirali-Shahreza},
  title     = {Drawing CAPTCHA},
  booktitle = {Proceedings of the 28th International Conference Information Technology Interfaces (ITI 2006)},
  address   = {Cavtat/Dubrovnik, Croatia},
  month     = jun,
  year      = {2006},
  pages     = {475--480},
  doi       = {10.1109/ITI.2006.1708527},
  url       = {https://doi.org/10.1109/ITI.2006.1708527}
}