[1]
M. V. Samoilenko, “Investigation of a discrete dynamical system in a neighborhood of the invariant torus”, Ukr. Mat. Zhurn., vol. 47, no. 12, pp. 1676–1685, Dec. 1995, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5561