Khang, Nguyen Van, and Tran Dinh Son. “On a Model of the Nonlinear Torsional Vibration With Variable Generalized Masses”. Vietnam Journal of Mechanics 14, no. 2 (June 30, 1992): 17–22. Accessed December 5, 2025. https://vjs.ac.vn/vjmech/article/view/10229.