KURDACHENKO, L. A.; PETRENKO, B. V.; SUBBOTIN, I. Ya. On complementability of certain generalized hypercenters in Artinian modules. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 11, p. 1548–1552, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5154. Acesso em: 14 apr. 2025.