O. Ravi, S. Padmasekaran, S. Usharani, and I. Rajasekaran. “$\breve{g}$-Closed and $\breve{g}$-Open Maps in Topological Spaces”. International Journal of Mathematics And its Applications 3, no. 4 - C (December 20, 2015): 1–8. Accessed May 20, 2024. http://ijmaa.in/index.php/ijmaa/article/view/500.