Kumari, P., M. Sahai, and R. K. Sharma. “Jordan Regular Units in Rings and Group Rings”. Ukrains’kyi Matematychnyi Zhurnal 75, no. 3 (April 11, 2023): 351–363. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/1130.