R. Asokan, O. Ravi, I. Rajasekaran, and R. Sathiyapriya. “$\tilde{g}$-Closed Sets in Ideal Topological Spaces”. International Journal of Mathematics And Its Applications, vol. 3, no. 3 - D, Nov. 2015, pp. 31-41, http://ijmaa.in/index.php/ijmaa/article/view/474.