ROITER, A. V.; SERGEYCHUK, V. V. Existence of a multiplicative basis for a finitely spaced module over an aggregate. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 46, n. 5, p. 567–579, 1994. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5719. Acesso em: 5 dec. 2025.