SamoilenkoA. M., and StepanenkoN. V. “On Some Properties of the Behavior of Linear Extensions of Dynamical Systems on a Torus under Perturbation of Phase Variables”. Ukrains’kyi Matematychnyi Zhurnal 54, no. 3 (March 25, 2002): 408-412. Accessed November 22, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4077.