Mahammed Shafik, R., and N. H. Shuker. “The Strongly Tri-Nil Clean Rings”. AL-Rafidain Journal of Computer Sciences and Mathematics, vol. 19, no. 1, June 2025, pp. 80-83, https://edusj.uomosul.edu.iq/index.php/csmj/article/view/49395.