Perestyuk, N.A. and Chernikova, O.S. (2002) “On Stability of Integral Sets of Impulsive Differential Systems”,
Ukrains’kyi Matematychnyi Zhurnal, 54(2), pp. 249–257. Available at:
https://umj.imath.kiev.ua/index.php/umj/article/view/4060 (Accessed: 10 April 2025).