Team, S. “Common Fixed Point Theorems in F-Complete Topological Spaces: K. P. R. Sastry, G. V. R. Babu, M. L. Sandhya”. Thai Journal of Mathematics, vol. 8, no. 1, Apr. 2010, pp. 43-50, https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/179.