ZHU, Hao. The formation of Russian borders and its impact on Russia’s national security. Journal of Education, Humanities and Social Sciences, [S. l.], v. 1, p. 64–70, 2022. DOI: 10.54097/ehss.v1i.632. Disponível em: https://drpress.org/ojs/index.php/EHSS/article/view/632. Acesso em: 28 aug. 2026.