Tijani, K. R., O. T. Wahab, I. F. Usamot, and S. M. Alata. “Common Coupled Fixed Point Theorems Without Compatibility in Partially Ordered Metric Spaces”. International Journal of Mathematical Sciences and Optimization: Theory and Applications 8, no. 1 (June 30, 2022): 88 - 100. Accessed November 22, 2024. http://ijmso.unilag.edu.ng/article/view/1573.