S. P. . Rogovchenko, “«Shortening» of calculating systems of differential equations with the impulse effeсt”, Ukr. Mat. Zhurn., vol. 40, no. 4, pp. 481–487, Jun. 1988, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/9183