KHAERUDDIN; FIRMAN; MUH. NUR; ELIZA M.YUSUP; MOHAMAD NUR HIDAYAT MAT; MOHAMMAD IVAN AZIS; SHAHRUL AZMIR OSMAN. Boundary Element Analysis of Acoustic Wave Problems in Functionally Graded Materials. International Journal of Integrated Engineering, [S. l.], v. 18, n. 4, p. 139–156, 2026. Disponível em: https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/23170. Acesso em: 22 jul. 2026.