ZABAVSKII, B. V.; ROMANIV, A. M. Rings with Elementary Reduction of Matrices. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 12, p. 1641–1649, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4568. Acesso em: 5 dec. 2025.