VENKATA SRINIVASU VEESAM; BANDARU SATISH BABU. Evaluation of Captcha Technologies towards Graphical Password Scheme. International Journal of Computer Engineering in Research Trends, [S. l.], v. 2, n. 2, p. 98–106, 2015. Disponível em: https://www.ijcert.org/index.php/ijcert/article/view/134. Acesso em: 1 jul. 2026.