Y. A. Martynyuk-Chernienko, “On the theory of stability of motion of a nonlinear system on a time scale”, Ukr. Mat. Zhurn., vol. 60, no. 6, pp. 776–782, Jun. 2008, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3195