XUE, Rui Kai. Geopolitical Frustration and Hybrid Response: Empirical Capture of Russian Behavior after the Ukraine Crisis (2013-2021). BLACK SEA REGION AT THE CROSSROADS OF CIVILIZATIONS, [S. l.], v. 4, n. 1, p. 184; 185–202, 2026. DOI: 10.61671/bsrcc.v4i1.11786. Disponível em: https://nbi.openjournals.ge/index.php/nbi/article/view/11786. Acesso em: 5 jul. 2026.