Artykbayeva, Zh.N., A.E. Mirzakulova, and A.A. Assilkhan. “Analytical Solution of Initial Value Problem for Ordinary Differential Equation With Singular Perturbation and Piecewise Constant Argument”. Journal of Mathematics, Mechanics and Computer Science 122, no. 2 (June 30, 2024): 3–13. Accessed November 21, 2024. https://bm.kaznu.kz/index.php/kaznu/article/view/1303.