Zhanbusinova, B.Kh., B.K. Shaykhmetova, and A.K. Zhanbolova. “Operator Method of Solving Differential-Difference Equations of First Order”. Bulletin of the Karaganda University. Mathematics Series 79, no. 3 (September 29, 2015): 40–43. Accessed December 8, 2025. https://mts.buketov.edu.kz/mathematics-vestnik/article/view/45.