Akhmet, M., N. Aviltay, M. Dauylbayev, and R. Seilova. “A Case of Impulsive Singularity”. Journal of Mathematics, Mechanics and Computer Science 117, no. 1 (April 6, 2023). Accessed November 23, 2024. https://bm.kaznu.kz/index.php/kaznu/article/view/1246.