DINH, N. V. Non-linearities in a quasi-linear system subjected to external and parametric excitations of different orders. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 18, n. 1, p. 22–26, 1996. DOI: 10.15625/0866-7136/10074. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/10074. Acesso em: 2 may. 2024.