El-Sayed, Wagdy G., Ragab O. Abd El-Rahman, Sheren A. Abd El-Salam, and Asmaa A. El Shahawy. “On the Solvability of a Functional Volterra Integral Equation”. JOURNAL OF ADVANCES IN MATHEMATICS 21 (December 28, 2022): 199–208. Accessed April 25, 2024. https://rajpub.com/index.php/jam/article/view/9352.