Anh, Le Thi Ngoc, Vu Thi An Ninh, Tran Van Lang, and Nguyen Dinh Kien. 2020. “Free Vibration of Bidirectional Functionally Graded Sandwich Beams Using a First-Order Shear Deformation Finite Element Formulation”. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE 14 (3), 136-50. https://doi.org/10.31814/stce.nuce2020-14(3)-12.