On existence of a smooth bounded semiinvariant manifold for a degenerate nonlinear system of difference equations in the space $\mathfrak{m}$. Neliniini Kolyvannya, [S. l.], v. 6, n. 3, p. 378–400, 2003. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/275. Acesso em: 22 jan. 2026.