KurdachenkoL. A., PetrenkoB. V., and SubbotinI. Ya. “On Complementability of Certain Generalized Hypercenters in Artinian Modules”. Ukrains’kyi Matematychnyi Zhurnal 49, no. 11 (November 25, 1997): 1548–1552. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5154.