Vlasenko, I.Y. (2002) “Topological Properties of Periodic Components of Structurally Stable Diffeomorphisms”, Ukrains’kyi Matematychnyi Zhurnal, 54(9), pp. 1190–1199. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4158 (Accessed: 16 April 2025).