GubareniN. M., DokuchaevM. A., and KirichenkoV. V. “Semiperfect Ipri-Rings and Right Bézout Rings”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 62, no. 5, May 2010, pp. 612–624, https://umj.imath.kiev.ua/index.php/umj/article/view/2892.