DINH, Nguyen Van. A note on the Melnikov function. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 29, n. 3, p. 285–291, 2007. DOI: 10.15625/0866-7136/29/3/5540. Disponível em: https://vjmech.vast.vn/vjmech/article/view/5540. Acesso em: 8 nov. 2025.