DR. VIJAY DHAKA, M. G. G. EVALUATING THE STRENGTH OF COGNITION BASED CAPTCHA BY THE APPLICATION OF CAPTCHA BREAKING ALGORITHM. International Journal of Engineering Technology and Computer Research, [S. l.], v. 2, n. 4, 2014. Disponível em: https://ijetcr.org/index.php/ijetcr/article/view/30. Acesso em: 25 may. 2026.