GORODNII, M. F.; LAGODA, O. A. Bounded Solutions for Some Classes of Difference Equations with Operator Coefficients. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 53, n. 11, p. 1495–1500, 2001. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4369. Acesso em: 6 dec. 2025.