JONDRUP, S.; TROSBORG, P. J. A Remark on Pure Ideals and Projective Modules. MATHEMATICA SCANDINAVICA, [S. l.], v. 35, p. 16–20, 1974. DOI: 10.7146/math.scand.a-11529. Disponível em: https://www.mscand.dk/article/view/11529. Acesso em: 14 apr. 2025.