Aboud, Sabah, and Buthaina Abdul Hassan. “Invertible Operators on Soft Normed Spaces”. Iraqi Journal of Science 61, no. 5 (May 28, 2020): 1089–1097. Accessed June 21, 2026. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/1376.