Asymptotic behavior of solutions of essentially nonlinear second order differential equations. Neliniini Kolyvannya, [S. l.], v. 19, n. 2, p. 173–180, 2016. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/821. Acesso em: 21 jan. 2026.