Khalaf, Alias Barakat, and Nehmat K. Ahmed. “\(S_\beta\)-Compact Sets and \(S_\beta\)-Locally Compact Spaces”. Journal of Advanced Studies in Topology 4, no. 1 (May 30, 2022): 113–118. Accessed December 5, 2022. https://m-sciences.com/index.php/jast/article/view/108.