O. I. Stadnik and D. Y. Khusainov, “Estimates of stability of desynchronized systems”, Ukr. Mat. Zhurn., vol. 45, no. 1, pp. 148–152, Jan. 1993, Accessed: Apr. 09, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5797