• http://www.repositorio.ufal.br/jspui/handle/123456789/12642
• http://www.repositorio.ufal.br/jspui/handle/123456789/12643
• http://www.repositorio.ufal.br/jspui/handle/123456789/12645
• http://www.repositorio.ufal.br/jspui/handle/123456789/17303
• http://www.repositorio.ufal.br/jspui/handle/123456789/17300