JONDRUP, S. On Finitely Generated Flat Modules III. Mathematica Scandinavica, Berkeley, CA, United States, v. 29, p. 206–210, 1971. DOI: 10.7146/math.scand.a-11046. Disponível em: https://journals.msp.org/mscand/article/view/2304. Acesso em: 25 jul. 2026.