GABRIEL, P. . Towards the Geopolitical-Economics of Conflict Over Resources: The Gate Valve Theory. Energy Economics Letters, [S. l.], v. 4, n. 1, p. 1–8, 2017. DOI: 10.18488/journal.82.2017.41.1.8. Disponível em: https://archive.aessweb.com/index.php/5049/article/view/157. Acesso em: 28 apr. 2024.