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 April 28, 2024. https://vjs.ac.vn/index.php/vjmech/article/view/10463.