Vigneshwaran, M., and M. Velmeenal. “On RFG-Closed Sets in Topological Spaces”. Journal of Informatics and Mathematical Sciences 9, no. 3 (October 30, 2017): 799–814. Accessed November 24, 2024. http://rgnpublications.com/journals/index.php/jims/article/view/943.