Ahmed IS, Ebrahim hassan H, Al-Fayadh A. Study of Fuzzy σ-Ring  and Some Related Concepts. IHJPAS [Internet]. 2022 Apr. 20 [cited 2025 Mar. 29];35(2):37-46. Available from: https://jih.uobaghdad.edu.iq/index.php/j/article/view/2767