DINH, N. V. Stability of the inverse pendulum with the hanging point in multifrequency motion. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 15, n. 4, p. 24–31, 1993. DOI: 10.15625/0866-7136/10216. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/10216. Acesso em: 27 apr. 2024.