@article{MAN_1956__131_160500,
     author = {H. Wegel},
     title = {Axiomatische {Mengenlehre} ohne {Elemente} von {Mengen.}},
     journal = {Mathematische Annalen},
     pages = {435--462},
     publisher = {mathdoc},
     volume = {131},
     year = {1956},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1956__131_160500/}
}