FUCHS, L.; VILJOEN, G. Quasi-Direct Decompositions of Torsion-Free Abelian Groups of Infinite Rank. MATHEMATICA SCANDINAVICA, [S. l.], v. 33, p. 205–212, 1973. DOI: 10.7146/math.scand.a-11484. Disponível em: https://www.mscand.dk/article/view/11484. Acesso em: 2 may. 2024.