DINH, Nguyen Van. Synchronization in the second approximation. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 25, n. 3, p. 145–152, 2003. DOI: 10.15625/0866-7136/25/3/6587. Disponível em: https://vjmech.vast.vn/vjmech/article/view/6587. Acesso em: 9 nov. 2025.