Dao, N. V., Dinh, N. V., Chi, T. K. and Dung, N. (2007) “A numerical approach of chaotic motions in a Duffing-Van der Pol oscillator”, Vietnam Journal of Mechanics. Hanoi, Vietnam, 29(3), pp. 197–206. doi: 10.15625/0866-7136/29/3/5532.