Samaher Marez. “Reliable Iterative Method for Solving Volterra - Fredholm Integro Differential Equations”. Al-Qadisiyah Journal of Pure Science 26, no. 2 (February 9, 2021): Math.1 –11. Accessed April 27, 2024. https://journalsc.qu.edu.iq/index.php/JOPS/article/view/1262.