ZABAVSKII, B. V.; PETRICHKOVICH, V. M. On the stable range of matrix rings. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 61, n. 11, p. 1575–1578, 2009. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3123. Acesso em: 5 dec. 2025.