MAE REYES ARIBON-LIBAG , Christle. Billing and online payment portal with multi-factor authentication using one-time password. Journal of Advanced Computer Science & Technology, [S. l.], v. 12, n. 1, p. 1–18, 2024. DOI: 10.14419/ggq10d74. Disponível em: https://sciencepubco.com/index.php/JACST/article/view/32435.. Acesso em: 13 may. 2024.