Thinh, Dang Huu. “The Influence of Random Excitation on Parametric Oscillations of Nonlinear System With One Degree of Freedom”. Vietnam Journal of Mechanics 4, no. 3 (September 30, 1982): 16–21. Accessed January 11, 2026. https://vjmech.vast.vn/vjmech/article/view/10463.