Thinh, Dang Huu. “The Influence of Random Excitation on Parametric Oscillations of Nonlinear System With One Degree of Freedom”. <i>Vietnam Journal of Mechanics</i> 4, no. 3 (September 30, 1982): 16–21. Accessed December 5, 2025. https://vjs.ac.vn/vjmech/article/view/10463.