BANAKH, T. O.; LYASKOVSKA, N. Completeness of invariant ideals in groups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 62, n. 8, p. 1022–1031, 2010. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2934. Acesso em: 11 apr. 2025.