Abdullah Jaafar, Hussein, and Sahira Mahmood Yaseen. “Supplement Rickart Modules”. Journal of Al-Qadisiyah for Computer Science and Mathematics 18, no. 2 (June 26, 2026): Math 39–45. Accessed June 26, 2026. https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/2664.