Mohammed, Akram, and Sinan AL-Salihi. “Quasi Duo Rings Whose Every Simple Singular Modules Is YJ-Injective”. Iraqi Journal of Science 55, no. 2B (November 28, 2023): 822–827. Accessed December 8, 2025. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/11849.