H. Mahmood, Akram, and Sara F. Abdullah. “Existence and Uniqueness of Mild Solution for Mixed Type of Integro-Differential Equation”. Journal of Education and Science 27, no. 4 (December 28, 2018): 161–167. Accessed September 10, 2025. https://edusj.uomosul.edu.iq/index.php/edusj/article/view/41932.