@article{MZ_1970__114_171309,
     author = {Helmut Pommer},
     title = {Subnormalit\"at in topologischen {Gruppen.}},
     journal = {Mathematische Zeitschrift},
     pages = {194--200},
     publisher = {mathdoc},
     volume = {114},
     year = {1970},
     zbl = {0179.32902},
     url = {http://geodesic.mathdoc.fr/item/MZ_1970__114_171309/}
}