DAO, N. V. Self- excited oscillation under the influence of non - linear frictions. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 4, n. 3, p. 7–10, 1982. DOI: 10.15625/0866-7136/10461. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/10461. Acesso em: 3 may. 2024.