@inproceedings{shirali2011multilingual,
  author    = {Shirali-Shahreza, S. and Shirali-Shahreza, M.},
  title     = {Multilingual Highlighting {CAPTCHA}},
  booktitle = {Proceedings of the 8th International Conference on Information Technology: New Generations ({ITNG} 2011)},
  address   = {Las Vegas, Nevada, USA},
  month     = apr,
  year      = {2011},
  pages     = {447--452},
  doi       = {10.1109/ITNG.2011.85},
  url       = {https://ieeexplore.ieee.org/document/5945277/}
}