TAI, L. L. On the existence of periodic solution of some quasilinear differential equations with impulses. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 26, n. 1, p. 55–64, 2004. DOI: 10.15625/0866-7136/26/1/5689. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/5689. Acesso em: 3 may. 2024.