H. Shuker, Nazar, نزار, Husam Q. Mohammad, and حسام. “Classification of Zero Divisor Graphs of Commutative Rings of Degrees 11,12 and 13”. AL-Rafidain Journal of Computer Sciences and Mathematics 11, no. 1 (June 25, 2025): 19–24. Accessed August 5, 2025. https://rjps.uomosul.edu.iq/index.php/csmj/article/view/19390.