OGOKE, I. The hand of Esau but the voice of Jacob. International Journal of Natural and Applied Sciences, [S. l.], v. 2, n. 3, 2007. DOI: 10.4314/ijonas.v2i3.36106. Disponível em: https://www.ajol.info/index.php/ijonas/article/view/36106. Acesso em: 22 sep. 2026.