On asymptotic representations of solutions of second order differential equations with nonlinearity close to an exponential. Neliniini Kolyvannya, [S. l.], v. 11, n. 4, p. 541–553, 2008. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/500. Acesso em: 21 jan. 2026.