Kapustyan, O. V. “On the Existence of Global Attractors for One Class of Cascade Systems”. Ukrains’kyi Matematychnyi Zhurnal 56, no. 9 (September 25, 2004): 1287-1291. Accessed April 28, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3842.