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, vol. 18, no. 3, Sept. 2026, pp. Math 159–169, doi:10.29304/jqcsm.2026.18.32888.