@article{JDM_1928__37_145801,
     author = {Karl Menger},
     title = {Bemerkungen zu {Grundlagenfragen.} {III.} {\"Uber} {Potenzmengen.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {303--308},
     publisher = {mathdoc},
     volume = {37},
     year = {1928},
     zbl = {54.0095.03},
     url = {http://geodesic.mathdoc.fr/item/JDM_1928__37_145801/}
}