BICH, Dao Huy; BICH, Nguyen Dang. Parametric conditions and exact solution for the Duffing-Van der Pol class of equations. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 40, n. 3, p. 251–264, 2018. DOI: 10.15625/0866-7136/11085. Disponível em: https://vjmech.vast.vn/vjmech/article/view/11085. Acesso em: 8 nov. 2025.