On bounded on the whole real axis solutions of nonlinear functional- difference equations and their properties. Neliniini Kolyvannya, [S. l.], v. 20, n. 2, p. 147–165, 2017. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/861. Acesso em: 8 dec. 2025.