LEVIN, G. Large homomorphisms of local rings. MATHEMATICA SCANDINAVICA, [S. l.], v. 46, p. 209–215, 1980. DOI: 10.7146/math.scand.a-11863. Disponível em: https://www.mscand.dk/article/view/11863. Acesso em: 5 may. 2024.