Taha H Jasim, Dr. Sami Abdullah Abed, and Ansam Ghazi Nsaif ALBU_Amer, “Concepts Of Bi-supra Topological Space Via graph Theory”, WJCMS, vol. 1, no. 2, pp. 59–64, Jun. 2022, doi: 10.31185/wjcm.Vol1.Iss2.37.