Ahmed, H. M., Y. H. Youssri, and W. M. Abd-Elhameed. “Recursive and Explicit Formulas for Expansion and Connection Coefficients in Series of Classical Orthogonal Polynomial Products”. Contemporary Mathematics 5, no. 4 (November 6, 2024): 4836–4873. Accessed November 7, 2024. https://ojs.wiserpub.com/index.php/CM/article/view/4990.