JONDRUP, S. On Finitely Generated Flat Modules. MATHEMATICA SCANDINAVICA, [S. l.], v. 26, p. 233–240, 1970. DOI: 10.7146/math.scand.a-10979. Disponível em: https://tidsskrift.dk/math/article/view/10979. Acesso em: 13 aug. 2026.