@article{MZ_1933__37_168468,
     author = {H. Raff},
     title = {Zur {Theorie} der linearen {Transformationen.}},
     journal = {Mathematische Zeitschrift},
     pages = {572--577},
     publisher = {mathdoc},
     volume = {37},
     year = {1933},
     zbl = {59.0233.03},
     url = {http://geodesic.mathdoc.fr/item/MZ_1933__37_168468/}
}