@article{JRAM_1974__265_151400,
     author = {Peter Gruber},
     title = {\"Uber kennzeichnende {Eigenschaften} von euklidischen {R\"aumen} und {Ellipsoiden.} {I.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {61--83},
     publisher = {mathdoc},
     volume = {265},
     year = {1974},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1974__265_151400/}
}