@article{10_4064_fm_51_2_149_178,
     author = {Stanis{\l}aw Balcerzyk},
     title = {On classes of abelian groups},
     journal = {Fundamenta Mathematicae},
     pages = {149--178},
     publisher = {mathdoc},
     volume = {51},
     number = {2},
     year = {1962},
     doi = {10.4064/fm-51-2-149-178},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-51-2-149-178/}
}