Huyen, Nguyen Ngoc, and Nguyen Tien Khiem. “Modal Analysis of Functionally Graded Timoshenko Beam”. Vietnam Journal of Mechanics 39, no. 1 (March 30, 2017): 31–50. Accessed April 27, 2024. https://vjs.ac.vn/index.php/vjmech/article/view/7582.