@article{10_4064_fm_44_1_84_90,
     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},
     pages = {84--90},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1957},
     doi = {10.4064/fm-44-1-84-90},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-44-1-84-90/}
}