Boichuk О. A., S. A. Krivosheya, and A. M. Samoilenko, “Boundary-Value problems for systems of integro-differential equations with Degenerate Kernel”, Ukr. Mat. Zhurn., vol. 48, no. 11, pp. 1576–1579, Nov. 1996, Accessed: Apr. 07, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5213