Tuan, Tran Van, Do Sanh, and Phan Van Thao. “Investigating Dynamics of Beating Vibration System With One Degree of Freedom on Elastic Foundation”. <i>Vietnam Journal of Mechanics</i> 16, no. 4 (December 31, 1994): 44–48. Accessed November 9, 2025. https://vjmech.vast.vn/vjmech/article/view/10182.