F. J. Al-Salehi B. An Approximate Solution of Non-Linear System of Volterra Integral Equation. RJCSM [Internet]. 2008 Jun. 5 [cited 2025 Dec. 17];5(1):11-9. Available from: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/37108