TROPIN, Oleg. On the Security of National Culture. Gosudarstvennaya Sluzhba, [S. l.], v. 13, n. 3, p. 113–115, 2011. Disponível em: https://gosudarstvennaya-sluzhba.owebs.ru/article/view/21328. Acesso em: 9 nov. 2026.