K. P. R. Sastry, K. K. M. Sarma, P. Krishna Kumari, Sunitha Choudari. Fixed Point Theorems for $\psi$-contractions in S-metric Spaces and KKS-metric Spaces. Int. J. Math. And Appl. [Internet]. 2017 Dec. 15 [cited 2024 May 20];5(4 - E):619-32. Available from: http://ijmaa.in/index.php/ijmaa/article/view/1318