محمود سليمان محمد, انجرو سامي, and ضاهر حسن نواف. 2020. “Numerical Algorithm for Solving Volterra-Fredholm Integro-Differential Equations”. Tishreen University Journal -Basic Sciences Series 42 (5). https://journal.tishreen.edu.sy/index.php/bassnc/article/view/10184.