DINH, N. V.; TRI, T. D. Frequency of a Vanderpol oscillator with large cubic restoring nonlinearity. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 25, n. 4, p. 195–200, 2003. DOI: 10.15625/0866-7136/25/4/6591. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/6591. Acesso em: 20 apr. 2024.