FREQUENCY OF NON-LINEAR DYNAMIC RESPONSE OF A POROUS FUNCTIONALLY GRADED CYLINDRICAL PANELS. Jurnal Teknologi, [S. l.], v. 84, n. 6, p. 59–68, 2022. DOI: 10.11113/jurnalteknologi.v84.18422. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/18422.. Acesso em: 4 may. 2024.