@article{MZ_1970__118_171444,
     author = {Helmut Pommer},
     title = {Verb\"ande vertauschbarer {Untergruppen.}},
     journal = {Mathematische Zeitschrift},
     pages = {103--106},
     publisher = {mathdoc},
     volume = {118},
     year = {1970},
     zbl = {0194.05402},
     url = {http://geodesic.mathdoc.fr/item/MZ_1970__118_171444/}
}