Yahyaa, Esraa H., and Sahira Mahmood yaseen. “Closed-Coessential and Closed-Coclosed Submodules”. Iraqi Journal of Science 66, no. 1 (January 30, 2025): 344–349. Accessed December 7, 2025. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/11552.