Fadhil, Hussein. “Existence, Multiplicity, and Spectral Approximation for Nonlinear Caputo FBVPs: A Fixed-Point and Operational Matrix Approach”. Journal of Al-Qadisiyah for Computer Science and Mathematics 18, no. 3 (September 30, 2026): Math 159–169. Accessed October 1, 2026. https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/2888.