KAROUBI, Max; VILLAMAYOR, O. $K$-théorie algébrique et $K$-théorie topologique I. Mathematica Scandinavica, Berkeley, CA, United States, v. 28, p. 265–307, 1971. DOI: 10.7146/math.scand.a-11024. Disponível em: https://journals.msp.org/mscand/article/view/2273. Acesso em: 25 jul. 2026.