Boonpok C, Khampakdee J. (Λ, sp)-open Sets in Topological Spaces. Eur. J. Pure Appl. Math. [Internet]. 2022 Apr. 30 [cited 2023 Dec. 10];15(2):572-88. Available from: https://ejpam.com/index.php/ejpam/article/view/4276