Saeed, Abdulkafi Mohammed. “Improved Rotated Finite Difference Method for Solving Fractional Elliptic Partial Differential Equations”. American Scientific Research Journal for Engineering, Technology, and Sciences 26, no. 1 (October 21, 2016): 261–270. Accessed May 1, 2024. https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/2216.