YEN, C.-T. RINGS WITH A DERIVATION WHOSE IMAGE IS CONTAINED IN THE NUCLEI. Tamkang Journal of Mathematics, [S. l.], v. 25, n. 4, p. 301–307, 1994. DOI: 10.5556/j.tkjm.25.1994.4458. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4458. Acesso em: 25 apr. 2024.