ESA, S. S.; FARIS, H. S. On γ-Clean Rings. Science Journal of University of Zakho, [S. l.], v. 5, n. 3, p. 285–287, 2017. DOI: 10.25271/2017.5.3.398. Disponível em: https://sjuoz.uoz.edu.krd/index.php/sjuoz/article/view/428. Acesso em: 2 may. 2024.