@article{MZ_1954__61_169472,
     author = {Konrad Jacobs},
     title = {Periodizit\"atseigenschaften beschr\"ankter {Gruppen} im {Hilbertschen} {Raum.}},
     journal = {Mathematische Zeitschrift},
     pages = {408--428},
     publisher = {mathdoc},
     volume = {61},
     year = {1954},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1954__61_169472/}
}