H. Shuker, Nazar, نزار, Rani S. Younis, and رانی. “On Dual Rings”. AL-Rafidain Journal of Computer Sciences and Mathematics 1, no. 1 (June 25, 2025): 20–26. Accessed August 6, 2025. https://rjps.uomosul.edu.iq/index.php/csmj/article/view/19925.