Santana H. Semina: Ciências Exatas e Tecnológicas, v. 29, n. 2, 2008. Semin., Exact Tech. Scienc. [Internet]. 2008 Dec. 15 [cited 2024 May 9];29(2). Available from: https://ojs.uel.br/revistas/uel/index.php/semexatas/article/view/2984