Thinh, Tran Ich, and Ngo Nhu Khoa. “A New Finite Element for Free Vibration Analysis of Stiffened Composite Plates”. <i>Vietnam Journal of Mechanics</i> 29, no. 4 (December 31, 2007): 529–538. Accessed November 8, 2025. https://vjmech.vast.vn/vjmech/article/view/5603.