Dao, Nguyen Van, Nguyen Van Dinh, Tran Kim Chi, and Nguyen Dung. “A Numerical Approach of Chaotic Motions in a Duffing-Van Der Pol Oscillator”. Vietnam Journal of Mechanics 29, no. 3 (September 22, 2007): 197–206. Accessed April 26, 2025. https://vjs.ac.vn/vjmech/article/view/5532.