@article{10_21136_CMJ_1960_100422,
     author = {\v{S}ik, Franti\v{s}ek},
     title = {\"Uber subdirekte {Summen} geordneter {Gruppen}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {400--424},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {1960},
     doi = {10.21136/CMJ.1960.100422},
     mrnumber = {0123626},
     zbl = {0102.26501},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1960.100422/}
}