Conditions for almost periodicity of bounded solutions of nonlinear difference equations with continuous argument. Neliniini Kolyvannya, [S. l.], v. 16, n. 1, p. 118–124, 2013. Disponível em: https://nosc.imath.kiev.ua/index.php/nosc/article/view/685. Acesso em: 12 apr. 2026.