E. J. Harjan, “Results Concerning the Trace of Some Biadditive Mappings of Prime and Semiprime Rings”, Al-Nahrain J. Sci., vol. 19, no. 3, pp. 124–130, May 2018, Accessed: May 22, 2026. [Online]. Available: https://anjs.edu.iq/index.php/anjs/article/view/217