Baizhanova, M.T., and B.Kh. Turmetov. “On Solvability of the Initial-Boundary Value Problems for a Nonlocal Hyperbolic Equation With Periodic Boundary Conditions”. Bulletin of the Karaganda University. Mathematics Series 119, no. 3 (September 30, 2025): 46–56. Accessed October 5, 2025. https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/873.