Sihag, Vizender, and Ramesh Kumar Vats. “Coupled Coincidence Point Result in Partially Ordered Generalized Metric Spaces”. Tamkang Journal of Mathematics 43, no. 4 (December 26, 2012): 609–619. Accessed May 4, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/992.