AzarangA., KaramzadehO. A. S., and NamaziA. “Hereditary Properties Between a Ring and Its Maximal Subrings”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 65, no. 7, July 2013, pp. 883–893, https://umj.imath.kiev.ua/index.php/umj/article/view/2475.