Asymptotic behavior of solutions of essentially nonlinear nonautonomous second-order differential equations that are close to linear functions. Neliniini Kolyvannya, [S. l.], v. 25, n. 1, p. 3–13, 2022. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/1052. Acesso em: 6 dec. 2025.