Azarang, A., O. A. S. Karamzadeh, and A. Namazi. “Hereditary Properties Between a Ring and Its Maximal Subrings”. Ukrains’kyi Matematychnyi Zhurnal 65, no. 7 (July 25, 2013): 883–893. Accessed April 19, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2475.