@article{GDZPPN002292432,
title = {Isomorphic Direct Summands of Abelian Groups.},
journal = {Mathematische Annalen},
volume = {154},
year = {1964},
pages = {21-37},
zbl = {0122.27801},
url = {http://dml.mathdoc.fr/item/GDZPPN002292432}
}
BEAUMONT, R.A.; PIERCE, R.S. Isomorphic Direct Summands of Abelian Groups.. Mathematische Annalen, Tome 154 (1964) pp. 21-37. http://gdmltest.u-ga.fr/item/GDZPPN002292432/