@article{MZ_1920__6_167558,
     author = {W., Blaschke},
     title = {\"Uber affine {Geometrie} {XXVI:} {Wackelige} {Achtflache}},
     journal = {Mathematische Zeitschrift},
     pages = {85--93},
     publisher = {mathdoc},
     volume = {6},
     year = {1920},
     zbl = {47.0681.05},
     url = {http://geodesic.mathdoc.fr/item/MZ_1920__6_167558/}
}