Richard Youngs: Energy Security: Europe’s New Foreign Policy Challenge. Czech Journal of International Relations, Prague, Czech Republic, v. 45, n. 4, p. 99–102, 2010. DOI: 10.32422/cjir.419. Disponível em: https://cjir.suma.software/index.php/cjir/article/view/419. Acesso em: 12 mar. 2026.