@misc{MZ_1925__22_167842,
     title = {Fraenkel, {A.,} {Untersuchungen} \"uber die {Grundlagen} der {Mengenlehre}},
     journal = {Mathematische Zeitschrift},
     pages = {250--273},
     publisher = {mathdoc},
     volume = {22},
     year = {1925},
     zbl = {51.0047.07},
     url = {http://geodesic.mathdoc.fr/item/MZ_1925__22_167842/}
}