Antony Rex Rodrigo, J., O. Ravi, and A. Naliniramalatha. “$\hat{g}$-Closed Sets in Ideal Topological Spaces”. Methods of Functional Analysis and Topology 17, no. 3 (September 25, 2011): 274–280. Accessed December 16, 2025. https://zen.imath.kiev.ua/index.php/mfat/article/view/492.