DINH, Nguyen Van. The cubic non-linearity of order ε in the second approximation. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 21, n. 4, p. 203–212, 1999. DOI: 10.15625/0866-7136/10002. Disponível em: https://vjmech.vast.vn/vjmech/article/view/10002. Acesso em: 9 nov. 2025.