On existence of a smooth bounded semiinvariant manifold for a degenerate nonlinear system of difference equations in the space $\mathfrak{m}$. НК [Internet]. 2003 Sep. 29 [cited 2026 Jan. 22];6(3):378-400. Available from: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/275