Mirzakulova, A. E., M. M. Aldazharova, Zh. T. Moldabek, and T. M. Aldibekov. 2017. “Generalized Singular Exponents Linear System of Differential Equations”. Journal of Mathematics, Mechanics and Computer Science 88 (1):47-54. https://bm.kaznu.kz/index.php/kaznu/article/view/329.