@article{MZ_1955__63_169527,
     author = {Ott-Heinrich Keller},
     title = {Eine {Bemerkung} zur {Ausf\"uhrung} der k\"orpertheoretischen {Operationen} in ertr\"aglich vielen {Schritten.}},
     journal = {Mathematische Zeitschrift},
     pages = {277--285},
     publisher = {mathdoc},
     volume = {63},
     year = {1955},
     zbl = {0066.28902},
     url = {http://geodesic.mathdoc.fr/item/MZ_1955__63_169527/}
}