OKHRIMENKO, A.; STOKIPNYI, O.; KOVTUN, V. Methods for ensuring long-term validation of electronic signatures. Ukrainian Scientific Journal of Information Security, [S. l.], v. 31, n. 3, p. 169–174, 2025. DOI: 10.18372/2225-5036.31.21163. Disponível em: http://jrnl.kai.edu.ua/index.php/Infosecurity/article/view/21163. Acesso em: 9 may. 2026.