DINH, N. V. On a form of Lyapunov exponents (I: Establishment of the form). Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 26, n. 4, p. 208–214, 2004. DOI: 10.15625/0866-7136/26/4/5704. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/5704. Acesso em: 20 jan. 2022.