MAULANI, G.; GUNAWAN, G.; LELI, L.; AYU NABILA, E. .; YESTINA SARI, W. . Digital Certificate Authority with Blockchain Cybersecurity in Education. International Journal of Cyber ​​and IT Service Management (IJCITSM), [S. l.], v. 1, n. 1, p. 136–150, 2021. DOI: 10.34306/ijcitsm.v1i1.40. Disponível em: https://iiast.iaic-publisher.org/ijcitsm/index.php/IJCITSM/article/view/40. Acesso em: 13 oct. 2025.