Necessary and sufficient conditions for the invertibility of piecewise autonomous difference operators in the space of bounded two-sided sequences. Neliniini Kolyvannya, [S. l.], v. 23, n. 1, p. 90–111, 2020. Disponível em: https://nosc.imath.kiev.ua/index.php/nosc/article/view/979. Acesso em: 11 apr. 2026.