"The Improved Operational Matrices of DP-Ball Polynomials for Solving Singular Second Order Linear Dirichlet-Type Boundary Value Problems". Hadhramout University Journal of Natural & Applied Sciences 19, no. 1 (نوفمبر 19, 2023). تاريخ الوصول يوليو 28, 2026. https://hu.edu.ye/hu-publications/journals/index.php/hujnas/article/view/22.