TEAM, S. Exchange General Rings with Bounded Indices are Clean: Weixing Chen. Thai Journal of Mathematics, [S. l.], v. 7, n. 2, p. 353–359, 2009. Disponível em: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/167. Acesso em: 3 may. 2024.