OVWASA, O. L. The Oil Producing Minority States and Marginalization in Nigeria. Nnamdi Azikiwe Journal of Political Science, [S. l.], v. 2, n. 2, p. 65–81, 2002. Disponível em: https://najops.org.ng/index.php/najops/article/view/149. Acesso em: 11 apr. 2025.