Kirichenko, V. V., and Yu. V. Yaremenko. “Multiserial Rings”. Ukrains’kyi Matematychnyi Zhurnal 48, no. 9 (September 25, 1996): 1223–1235. Accessed April 14, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/5237.