SAMIR, Sanaa; OWAID, Bashar. Numerical Analysis of Free Vibration Characteristics in Multilayer Functionally Graded Plates with Coal/Polyester Composites. Journal of Engineering and Sustainable Development, Baghdad, Iraq, v. 29, n. 5, p. 626–633, 2025. DOI: 10.31272/jeasd.2554. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/2554.. Acesso em: 4 jun. 2026.