O. Ravi, M. Jeyaraman, M. Sajan Joseph, and R. Muthuraj. “$(1,2)^\star$-$g^\star$-Closed Sets”. International Journal of Mathematics And its Applications 3, no. 4 - B (December 10, 2015): 59–70. Accessed July 22, 2024. https://ijmaa.in/index.php/ijmaa/article/view/497.