@article{MAN_1979__241_163263,
     author = {S\"onke Hiepko},
     title = {Eine innere {Kennzeichnung} der verzerrten {Produkte.}},
     journal = {Mathematische Annalen},
     pages = {209--216},
     publisher = {mathdoc},
     volume = {241},
     year = {1979},
     zbl = {0387.53014},
     url = {http://geodesic.mathdoc.fr/item/MAN_1979__241_163263/}
}