V. Kiran, K. Rajani Devi, and J. Niranjan Goud. “Common Fixed Point Theorems for Three Self Maps of a Complete \(S\)-Metric Space”. Malaya Journal of Matematik 8, no. 01 (January 1, 2020): 288–293. Accessed November 4, 2024. https://www.malayajournal.org/index.php/mjm/article/view/1398.