Lien, Tran Van, and Le Thi Ha. “Vibration Analysis of Timoshenko Microbeams Made of Functionally Graded Materials on a Winkler-Pasternak Elastic Foundation ”. <i>Vietnam Journal of Mechanics</i>, vol. 46, no. 1, Mar. 2024, pp. 31-43, doi:10.15625/0866-7136/20579.