@article{ELMA_1965__20_140799,
     author = {W. Wunderlich},
     title = {Starre, kippende, wackelige und bewegliche {Achtflache.}},
     journal = {Elemente der Mathematik},
     pages = {25--32},
     publisher = {mathdoc},
     volume = {20},
     year = {1965},
     zbl = {0126.36906},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1965__20_140799/}
}