MARCHUK, N. A.; TEPLINSKY, Yu. V. On the Fréchet Differentiability of Invariant Tori of Countable Systems of Difference Equations Defined on Infinite-Dimensional Tori. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 1, p. 75–90, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3889. Acesso em: 11 apr. 2025.