S. Pious Missier, and K. M. Arifmohammed. “Functions Associated With $^*g \hat{\alpha}$-Closed Sets in Topological Spaces”. International Journal of Mathematics And Its Applications, vol. 6, no. 3, Sept. 2018, pp. 273-8, https://ijmaa.in/index.php/ijmaa/article/view/380.