N. Balamani, A. Parvathi. $\psi^{*}\alpha$-Closed Sets in Bitopological Spaces. Int. J. Math. And Appl. [Internet]. 2017 Dec. 1 [cited 2024 Jul. 22];5(4 - D):449-56. Available from: https://ijmaa.in/index.php/ijmaa/article/view/1291