Kien, Nguyen Dinh. “Free Vibration of Prestress Timoshenko Beams Resting on Elastic Foundation”. <i>Vietnam Journal of Mechanics</i> 29, no. 1 (March 31, 2007): 1–12. Accessed November 8, 2025. https://vjmech.vast.vn/vjmech/article/view/5586.