Horodnii М. F. Bounded and summable solutions of a difference equation with piecewise constant operator coefficients. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 7, p. 930–938, 2022. DOI: 10.37863/umzh.v74i7.7087. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7087. Acesso em: 5 dec. 2025.