Dauylbayev, M.K., M. Akhmet, and N. Aviltay. “Asymptotic Expansion of the Solution for Singular Perturbed Linear Impulsive Systems”. Journal of Mathematics, Mechanics and Computer Science 122, no. 2 (June 30, 2024): 14–26. Accessed November 21, 2024. https://bm.kaznu.kz/index.php/kaznu/article/view/1451.