[1]
R. I. Petryshyn and Sopronyuk Т. M., “Justification of Averaging Method for Multifrequency Impulsive Systems”, Ukr. Mat. Zhurn., vol. 55, no. 1, pp. 55–65, Jan. 2003, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3887