“On Additive Mapping With Period 3 on Rings and Near-Rings”. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ) 42, no. 1 (October 7, 2021): 259–273. Accessed August 12, 2026. https://jrucs.iq/index.php/JAUCS/article/view/168.