El-Sayed, Wagdy G., Ragab O. Abd El-Rahman, Sheren A. Abd El-Salam, and Asmaa A. El Shahawy. “On the Existence of a Bounded Variation Solution of a Fractional Integral Equation in L1[0, T] Due to the Spread of COVID 19”. JOURNAL OF ADVANCES IN MATHEMATICS 21 (July 29, 2022): 107–115. Accessed December 22, 2024. https://rajpub.com/index.php/jam/article/view/9254.