G. El Turki, Taha. “The Extremal and Infra-Topological Spaces over a Finite Set-A Computational Approach With Maple”. Libyan Journal of Science &Technology 15, no. 2 (April 13, 2026): 243–246. Accessed April 25, 2026. https://next.fannak.com/index.php/LJST/article/view/7639.