Mardanov, M.J., Y.A. Sharifov, and K.E. Ismayilova. “Existence and Uniqueness of Solutions for the System of Integro-Differential Equations With Three-Point and Nonlinear Integral Boundary Conditions”. Bulletin of the Karaganda University. Mathematics Series 99, no. 3 (September 30, 2020): 26–37. Accessed July 9, 2025. https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/378.