Hung DT, Lien TV, Dinh TB, Thang NT. Free vibration analysis of FGM framed nanostructures using variational-consistent boundary conditions. Vietnam J. Mech. [Internet]. 2023 Jun. 14 [cited 2024 May 9];45(2):145-63. Available from: https://vjs.ac.vn/index.php/vjmech/article/view/18192