FREE VIBRATION ANALYSIS OF THIN RECTANGULAR PLATES USING PIECEWISE SHAPE FUNCTIONS IN RITZ PROCEDURE. Nigerian Journal of Technology, [S. l.], v. 43, n. 4, p. 646 – 654, 2025. DOI: 10.4314/njt.v43i4.5. Disponível em: https://mail.nijotech.com/index.php/nijotech/article/view/4170. Acesso em: 17 apr. 2026.