DINH, Nguyen Van; TRI, Tran Duong. Frequency of a Vanderpol oscillator with large cubic restoring nonlinearity. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 25, n. 4, p. 195–200, 2003. DOI: 10.15625/0866-7136/25/4/6591. Disponível em: https://vjmech.vast.vn/vjmech/article/view/6591. Acesso em: 8 nov. 2025.