Abdyldaeva, E.F., A.K. Kerimbekov, and M.T. Zhaparov. “On the Solvability of a Nonlinear Optimization Problem With Boundary Vector Control of Oscillatory Processes”. Bulletin of the Karaganda University. Mathematics Series 109, no. 1 (March 30, 2023): 5–13. Accessed July 9, 2025. https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/548.