Al-Saadi, Saad A., and Aya A. Al-Rubaye. “⊕-S-Extending Modules”. Ibn AL-Haitham Journal For Pure and Applied Sciences 33, no. 3 (July 20, 2020): 80–88. Accessed March 26, 2025. https://jih.uobaghdad.edu.iq/index.php/j/article/view/2475.