Talak AF, Abed MM. Duo Submodule and C_1-module. J. Al-Qadisiyah Comp. Sci. Math. [Internet]. 2021 Mar. 4 [cited 2024 Nov. 14];13(1):Math Page 155– 160. Available from: https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/763