SKOLEM, Th. Remarks on Proofs by Cyclotomic Formulas of Reciprocity Laws for Power Residues. Mathematica Scandinavica, Berkeley, CA, United States, v. 9, p. 229–242, 1961. DOI: 10.7146/math.scand.a-10637. Disponível em: https://journals.msp.org/mscand/article/view/2713. Acesso em: 25 jul. 2026.