@article{ELMA_1983__38_141311,
     author = {Wilhelm Vetter},
     title = {Das {Gegenst\"uck} zu logarithmischen {Spirale} in der ebenen isotrpen {Geometrie.}},
     journal = {Elemente der Mathematik},
     pages = {61--69},
     publisher = {mathdoc},
     volume = {38},
     year = {1983},
     zbl = {0512.53001},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1983__38_141311/}
}