@article{bwmeta1.element.bwnjournal-article-fmv44i1p84bwm,
author = {J. \L o\'s},
title = {Abelian groups that are direct summands of every abelian group which contains them as pure subgroups},
journal = {Fundamenta Mathematicae},
volume = {44},
year = {1957},
pages = {84-90},
zbl = {0079.03402},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv44i1p84bwm}
}
Łoś, J. Abelian groups that are direct summands of every abelian group which contains them as pure subgroups. Fundamenta Mathematicae, Tome 44 (1957) pp. 84-90. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv44i1p84bwm/