EVANS, R. J.; ISAACS, I. M. Fields generated by linear combinations of roots of unity, II. Mathematica Scandinavica, Berkeley, CA, United States, v. 43, p. 26–34, 1978. DOI: 10.7146/math.scand.a-11759. Disponível em: https://journals.msp.org/mscand/article/view/1888. Acesso em: 25 jul. 2026.