@article{1183503234,
author = {Baer, Reinhold},
title = {Abelian groups that are direct summands of every containing abelian group},
journal = {Bull. Amer. Math. Soc.},
volume = {46},
number = {11},
year = {1940},
pages = { 800-806},
language = {en},
url = {http://dml.mathdoc.fr/item/1183503234}
}
Baer, Reinhold. Abelian groups that are direct summands of every containing abelian group. Bull. Amer. Math. Soc., Tome 46 (1940) no. 11, pp. 800-806. http://gdmltest.u-ga.fr/item/1183503234/