SLYUSARCHUK, V. Yu. Almost periodic and Poisson stable solutions of difference equations in metric spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 12, p. 1707–1714, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2103. Acesso em: 14 apr. 2025.