LE, Cong Ich; TRAN, Quang Dung; PHAM, Vu Nam; NGUYEN, Dinh Kien. Free vibration and buckling of bidirectional functionally graded sandwich plates using an efficient Q9 element. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 43, n. 3, p. 277–295, 2021. DOI: 10.15625/0866-7136/15981. Disponível em: https://vjmech.vast.vn/vjmech/article/view/15981. Acesso em: 9 nov. 2025.