RIBENBOIM, P. Pfister’s Dimension and the Level of Fields.
MATHEMATICA SCANDINAVICA
,
[S. l.]
, v. 35, p. 301–308, 1974. DOI: 10.7146/math.scand.a-11554. Disponível em: https://www.mscand.dk/article/view/11554. Acesso em: 14 apr. 2025.