Rashwan, Rashwan, and Samera Saleh. “Solution of Nonlinear Integral Equations via Fixed Point Theorems in G-Metric Spaces”. International Journal of Applied Mathematical Research 3, no. 4 (November 21, 2014): 561–571. Accessed May 5, 2024. https://www.sciencepubco.com/index.php/ijamr/article/view/3651.