Free Vibration Analysis of all round Clamped Thin Isotropic Rectangular Plate by Ritz Direct Variational Method . Nigerian Journal of Technology, [S. l.], v. 40, n. 6, p. 1030–1038, 2021. Disponível em: https://www.nijotech.com/index.php/nijotech/article/view/2736. Acesso em: 28 apr. 2026.