TINH, N. D. The influence of nonlinear terms in mechanical systems having two degrees of freedom. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 28, n. 3, p. 155–164, 2006. DOI: 10.15625/0866-7136/28/3/5575. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/5575. Acesso em: 19 apr. 2024.