Marchuk NA, Teplinsky YV. On the Fréchet Differentiability of Invariant Tori of Countable Systems of Difference Equations Defined on Infinite-Dimensional Tori. Ukr. Mat. Zhurn. [Internet]. 2003Jan.25 [cited 2024May18];55(1):75-0. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3889