Hien, Vu Quoc, Tran Ich Thinh, and Nguyen Manh Cuong. “Free Vibration Analysis of Joined Composite Conical-Cylindrical-Conical Shells Containing Fluid”. <i>Vietnam Journal of Mechanics</i> 38, no. 4 (December 20, 2016): 249–265. Accessed November 8, 2025. https://vjmech.vast.vn/vjmech/article/view/6954.