GONÇALVES FILHO, O. J. A.; VELOZO, F. S.; SOUZA, M. C. L. 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, [S. l.], n. 1, p. 79, 2015. Disponível em: https://revistas.ien.gov.br/index.php/ienprogressreport/article/view/61. Acesso em: 11 maio. 2024.