CHARLES, Joseph O.; IKPI, Ntongha Eni; CHARLES, Arit O. Ethnicity: A Social Pathology in Nigerian Federalism and Unity. International Journal of Social Sciences, [S. l.], v. 12, n. 4, p. 144–157, 2018. Disponível em: https://www.ijss.com.ng/index.php/home/article/view/99. Acesso em: 3 feb. 2026.