EECKHOUT, Piet, External Relations of the European Union. Legal and Constitutional Foundations, Oxford University Press, 2005. Revista Electrónica de Estudios Internacionales, [S. l.], n. 13, 2025. DOI: 10.36151/. Disponível em: https://reei.tirant.com/reei/article/view/4368. Acesso em: 7 jun. 2025.