THOM, Tran Thi; KIEN, Nguyen Dinh. Free vibration of two-directional FGM beams using a higher-order Timoshenko beam element. <b>Vietnam Journal of Science and Technology</b>, Hanoi, VN, v. 56, n. 3, p. 380–396, 2018. DOI: 10.15625/2525-2518/56/3/10754. Disponível em: https://vjs.ac.vn/jst/article/view/10754. Acesso em: 10 jan. 2026.