“Solve Partial Differential Equations Using the Banach Contraction Method and Improve Results Using the Trapezoidal Rule”. AL-Rafidain Journal of Computer Sciences and Mathematics 15, no. 1 (June 10, 2021): 79–85. Accessed June 25, 2026. https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36502.