Asaad, Baravan A., Mohammed K. Tahat, and Tareq M. Al-shami. “Supra B Maps via Topological Ordered Spaces”. European Journal of Pure and Applied Mathematics 12, no. 3 (July 25, 2019): 1231–1247. Accessed December 5, 2022. https://www.ejpam.com/index.php/ejpam/article/view/3483.