ALHALEEM, N.R. Abed; HANDAM, A. H. Invo-clean rings associated with central polynomials. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 43, p. 517–522, 2020. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/7321. Acesso em: 6 nov. 2026.