TINH, Nguyen Duc. The influence of nonlinear terms in mechanical systems having two degrees of freedom. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 28, n. 3, p. 155–164, 2006. DOI: 10.15625/0866-7136/28/3/5575. Disponível em: https://vjmech.vast.vn/vjmech/article/view/5575. Acesso em: 8 nov. 2025.