ШЕВЧУК, Анатолій Васильович. Model of protection means of printed documents. Ukrainian Information Security Research Journal, [S. l.], v. 15, n. 1, p. 63–66, 2013. DOI: 10.18372/2410-7840.15.4220. Disponível em: https://jrnl.kai.edu.ua/index.php/ZI/article/view/4220. Acesso em: 11 oct. 2026.