AUSLANDER, M.; REITEN, I.; SMALO, S. O. Galois actions on rings and finite Galois coverings. Mathematica Scandinavica, Berkeley, CA, United States, v. 65, p. 5–32, 1989. DOI: 10.7146/math.scand.a-12261. Disponível em: https://journals.msp.org/mscand/article/view/1384. Acesso em: 24 jul. 2026.