Tung, Hoang Van, and Nguyen Dinh Duc. “Thermal Buckling of Imperfect Functionally Graded Cylindrical Shells According to Wan-Donnell Model”. <i>Vietnam Journal of Mechanics</i>, vol. 30, no. 3, Oct. 2008, pp. 185 – 194, doi:10.15625/0866-7136/30/3/5618.