[1]
A. Y. Luchka, “Methods for the investigation of systems of differential equations with pulse influence”, Ukr. Mat. Zhurn., vol. 50, no. 2, pp. 189–194, Feb. 1998, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4954