ET. AL., J. S. . A Study on some modified Classical Ciphers for Secure Crypto-System. Turkish Journal of Computer and Mathematics Education (TURCOMAT), [S. l.], v. 12, n. 6, p. 5316–5319, 2021. DOI: 10.17762/turcomat.v12i6.9351. Disponível em: https://www.turcomat.org/index.php/turkbilmat/article/view/9351. Acesso em: 4 may. 2024.