Gonçalves Filho, O. J. A., F. S. Velozo, e M. C. L. Souza. 2015. “Implementation of a Numeric Algorithm for the Solution of the Generalized Christoffel Equation Referred to Orthotropic Materials under Plane Stress State”. Instituto De Engenharia Nuclear: Progress Report, nº 1 (julho):79. https://revistas.ien.gov.br/index.php/ienprogressreport/article/view/61.