МАЧАЛИН, И. А. Сriterion of periodicity of checking uptime of telecommunications systems. Ukrainian Information Security Research Journal, [S. l.], v. 14, n. 3 (56), p. 25–28, 2012. DOI: 10.18372/2410-7840.14.3355. Disponível em: http://jrnl.kai.edu.ua/index.php/ZI/article/view/3355. Acesso em: 26 apr. 2026.