СУЛІМА, О. А. Model of multilevel access system. Ukrainian Scientific Journal of Information Security, [S. l.], v. 23, n. 2, p. 122–129, 2017. DOI: 10.18372/2225-5036.23.11817. Disponível em: http://jrnl.kai.edu.ua/index.php/Infosecurity/article/view/11817. Acesso em: 14 jun. 2026.