The Cubic B-spline Operational Matrix Based on Haar Scaling Functions for Solving Varieties of the Fractional Integro-differential Equations. Punjab Univ. J. Math. [Internet]. 2025 May 18 [cited 2025 Jun. 29];51(8):45-6. Available from: https://pujm.pu.edu.pk/index.php/pujm/article/view/471