Sayed, S. M., A. S. Mohamed, E. M. Abo El-Dahab, and Y. H. Youssri. “Alleviated Shifted Gegenbauer Spectral Method for Ordinary and Fractional Differential Equations”. Contemporary Mathematics 5, no. 2 (May 10, 2024): 1344–1370. Accessed December 11, 2024. https://ojs.wiserpub.com/index.php/CM/article/view/4559.