@article{MZ_1959__71_169823,
     author = {Reinhold Baer},
     title = {Direkte {Produkte} von {Gruppen} teilerfremder {Ordnung.}},
     journal = {Mathematische Zeitschrift},
     pages = {454--457},
     publisher = {mathdoc},
     volume = {71},
     year = {1959},
     zbl = {0092.02402},
     url = {http://geodesic.mathdoc.fr/item/MZ_1959__71_169823/}
}