Khalaf, A. J., & Taha, B. A. (2021). Numerical Study of the System of Nonlinear Volterra Integral Equations by Using Spline Method. Journal of Al-Qadisiyah for Computer Science and Mathematics, 13(3), Math Page 34– 43. https://doi.org/10.29304/jqcm.2021.13.3.836