JOEL, O.; UJILE, A. Performance evaluation of low-density bentonite and econolite cement slurries. International Journal of Natural and Applied Sciences, [S. l.], v. 5, n. 4, 2012. DOI: 10.4314/ijonas.v5i4. Disponível em: https://www.ajol.info/index.php/ijonas/article/view/76678. Acesso em: 15 oct. 2026.