Huyen, Nguyen Ngoc, and Nguyen Tien Khiem. “Uncoupled Vibrations in Functionally Graded Timoshenko Beam”. <i>Vietnam Journal of Science and Technology</i> 54, no. 6 (December 7, 2016): 785–796. Accessed June 7, 2026. http://vjst.vast.vn/jst/article/view/7719.