@article{MOMA_1951__55_176872,
     author = {Alexander Aigner},
     title = {Der multiplikative {Aufbau} beliebiger unendlicher {Ordnungszahlen.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {297--299},
     publisher = {mathdoc},
     volume = {55},
     year = {1951},
     zbl = {0044.04801},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1951__55_176872/}
}