PANKRUKHIN, Alexander. Russia’s Marketing Increased by Siberia and Ural. Gosudarstvennaya Sluzhba, [S. l.], v. 13, n. 1, p. 38–42, 2011. Disponível em: https://gosudarstvennaya-sluzhba.owebs.ru/article/view/21220. Acesso em: 9 nov. 2026.