DAO, N. V. Nonlinear vibration of a pendulum with a support in harmonic motion. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 29, n. 3, p. 177–185, 2007. DOI: 10.15625/0866-7136/29/3/5530. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/5530. Acesso em: 25 jun. 2022.