@article{CMUC_1977__18_1_a1,
     author = {Be\v{c}v\'a\v{r}, Jind\v{r}ich},
     title = {$K$-essential subgroups of abelian groups. {III.}},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {11--18},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {1977},
     mrnumber = {0439953},
     zbl = {0359.20036},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1977__18_1_a1/}
}