O. V. Kapustyan, “On the existence of global attractors for one class of cascade systems”, Ukr. Mat. Zhurn., vol. 56, no. 9, pp. 1287–1291, Sep. 2004, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3842