Conditions for the existence of solutions of difference equations in the metric space of bounded sequences. Neliniini Kolyvannya, [S. l.], v. 26, n. 1, p. 146–154, 2023. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/1095. Acesso em: 21 jan. 2026.