EVSTAF’EV, R. Yu. On Artinian rings satisfying the Engel condition. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 9, p. 1264–1270, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3527. Acesso em: 6 dec. 2025.