KALYANI M. DUKARE; NAJUKA KHAIRE. REVIEW ON CAPTCHA. International Journal of Advance Research in Engineering, Science & Technology, [S. l.], v. 3, n. 10, p. 76–77, 2016. Disponível em: https://ijarest.org/index.php/ijarest/article/view/992. Acesso em: 23 mar. 2026.