EKE, Gabriel F.; OSAGHAE, Felix S. Leadership Problem and National Development: Is Nigeria A Failed State?. International Journal of Social Sciences, [S. l.], v. 13, n. 4, p. 38–47, 2019. Disponível em: https://www.ijss.com.ng/index.php/home/article/view/111. Acesso em: 16 dec. 2025.