BAVULA, V. V. Description of bilateral ideals in a class of noncommutative rings. I. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 2, p. 209–220, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5800. Acesso em: 14 apr. 2025.