ICH, Le Cong; CHINH, Nguyen Van; BINH, Tran Van; KIEN, Nguyen Dinh. Free vibration of bidirectional functionally graded sandwich beams partially resting on pasternak foundation based on a sinusoidal theory. <b>Vietnam Journal of Science and Technology</b>, Hanoi, VN, v. 58, n. 5, p. 635–649, 2020. DOI: 10.15625/2525-2518/58/5/15052. Disponível em: https://vjs.ac.vn/jst/article/view/15052. Acesso em: 8 jan. 2026.