[1]
A. O. Ignat'ev and Konosevich В. I., “On the stability of invariant sets of a system of autonomous differential equations under constantly acting perturbations”,
Ukr. Mat. Zhurn., vol. 51, no. 9, pp. 1287–1291, Sep. 1999, Accessed: Apr. 09, 2025. [Online]. Available:
https://umj.imath.kiev.ua/index.php/umj/article/view/4725