@article{MAN_1951__124_160269,
     author = {G. Falk},
     title = {Konstanzelemente in {Ringen} mit {Differentiation.}},
     journal = {Mathematische Annalen},
     pages = {182--186},
     publisher = {mathdoc},
     volume = {124},
     year = {1951},
     zbl = {0046.03105},
     url = {http://geodesic.mathdoc.fr/item/MAN_1951__124_160269/}
}