@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/