ESSEN, Jonte van. De Facto Regimes in International Law. Utrecht Journal of International and European Law, Utrecht, v. 28, n. 74, p. 31–49, 2012. DOI: 10.5334/ujiel.v28i74.25. Disponível em: https://utrechtjournal.org/article/view/26007.. Acesso em: 23 mar. 2026.