Necessary and sufficient conditions for the nonlinear difference operator $(Dx)(t) = x(t + 1) - f(x(t))$ to be invertible in the space of functions bounded and continuous on the axis. Neliniini Kolyvannya, [S. l.], v. 5, n. 3, p. 380–386, 2002. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/228. Acesso em: 22 jan. 2026.