DINH, N. V. A note on the method of harmonic balance. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 23, n. 1, p. 34–38, 2001. DOI: 10.15625/0866-7136/9938. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/9938. Acesso em: 26 apr. 2024.