ALIN, J. S.; ARMENDARIZ, E. P. A Class of Rings Having All Singular Simple Modules Injective. MATHEMATICA SCANDINAVICA, [S. l.], v. 23, p. 233–240, 1968. DOI: 10.7146/math.scand.a-10915. Disponível em: https://www.mscand.dk/article/view/10915. Acesso em: 24 nov. 2024.