DAO, N. V. Nonlinear oscillators under delay control. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 21, n. 2, p. 75–88, 2000. DOI: 10.15625/0866-7136/9989. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/9989. Acesso em: 25 apr. 2024.