Abdul-Kareem, Shaymaa Amer, Ahmed Amer Abdulkareem, and Yusra Amer Abdul-Kareem. “On Closed Quasi Principally Injective Acts over Monoids”. Iraqi Journal of Science 62, no. 4 (April 30, 2021): 1284–1292. Accessed January 7, 2026. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/2758.