Ysmagul Р.С., and Nurgeldina А.Е. “METHODS FOR SOLVING FREDHOLM INTEGRAL EQUATIONS”. Bulletin of Abai KazNPU. Series of Physical and mathematical sciences 69, no. 1 (June 3, 2021): 174–178. Accessed April 8, 2025. https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/242.