Ahmed, Khawla, and Nuhad S. Al. Mothafar. “Pure-Hollow Modules and Pure-Lifting Modules”. Iraqi Journal of Science 65, no. 3 (March 29, 2024): 1571–1577. Accessed January 9, 2026. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/9042.