DINH, Nguyen Van. Stability of the equilibrium regime of a system of two degrees of freedom in amplitude-phase variables. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 17, n. 1, p. 28–34, 1995. DOI: 10.15625/0866-7136/10121. Disponível em: https://vjmech.vast.vn/vjmech/article/view/10121. Acesso em: 8 nov. 2025.