A. M. Saeed, “Improved Rotated Finite Difference Method for Solving Fractional Elliptic Partial Differential Equations”, ASRJETS-Journal, vol. 26, no. 1, pp. 261–270, Oct. 2016, Accessed: Oct. 26, 2025. [Online]. Available: https://asrjetsjournal.org/American_Scientific_Journal/article/view/2216