@article{MZ_1976__148_172354,
     author = {Otto-Uwe Kramer},
     title = {\"Uber {Durchschnitte} von {Untergruppen} endlicher aufl\"osbarer {Gruppen.}},
     journal = {Mathematische Zeitschrift},
     pages = {89--98},
     publisher = {mathdoc},
     volume = {148},
     year = {1976},
     zbl = {0311.20006},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__148_172354/}
}