Sarbast Kamal Rasheed, Zana Mohammed Hassan, Sadeq Taha Abdulazeez,. “Investigating Solutions of Volterra Integral Equations Using the Successive Approximations”. Mathematical Statistician and Engineering Applications 72, no. 2 (September 12, 2023): 75–82. Accessed May 20, 2024. https://www.philstat.org/index.php/MSEA/article/view/2786.