VOROZHKO, V. . The establishment of the ukrainian system of state secret protection. 1991–1994. Ukrainian Scientific Journal of Information Security, [S. l.], v. 27, n. 2, p. 79–88, 2021. DOI: 10.18372/2225-5036.27.16004. Disponível em: http://jrnl.kai.edu.ua/index.php/Infosecurity/article/view/16004. Acesso em: 14 jun. 2026.