O. Ravi, R. Bhavani, S. Murugesan, and I. Rajasekaran. “On $\tilde{g} (1,2)^\star$-Closed Sets”. International Journal of Mathematics And Its Applications, vol. 3, no. 2, June 2015, pp. 65-73, https://ijmaa.in/index.php/ijmaa/article/view/421.