Viet, La Duc, and Nguyen Trong Kien. “Lower Bound of Performance Index of Anti-Sway Control of a Pendulum Using on-off Damping Radial Spring-Damper”. <i>Vietnam Journal of Mechanics</i> 41, no. 2 (June 25, 2019): 193–201. Accessed November 8, 2025. https://vjmech.vast.vn/vjmech/article/view/13625.