Dung, Dao Van, and Le Kha Hoa. “Solving Nonlinear Stability Problem of Imperfect Functionally Graded Circular Cylindrical Shells under Axial Compression by Galerkin’s Method”. <i>Vietnam Journal of Mechanics</i> 34, no. 3 (September 4, 2012): 139–156. Accessed November 8, 2025. https://vjmech.vast.vn/vjmech/article/view/2356.