Mohammed, Ramadhan A., O. R. Sayed, and A. Eliow. “Some Properties of Soft Delta-Topology”. Academic Journal of Nawroz University 8, no. 4 (December 28, 2019): 352–361. Accessed September 30, 2023. https://journals.nawroz.edu.krd/index.php/ajnu/article/view/481.