E. KANET, R. The Russian Challenge to the European Union. Debater a Europa, [S. l.], n. 18, p. 49-62, 2018. DOI: 10.14195/1647-6336_18_4. Disponível em: https://impactum-journals.uc.pt/debatereuropa/article/view/_18_4. Acesso em: 6 jun. 2025.