@article{GDZPPN00228507X,
title = {Zur Axiomatik der Mengenlehre.},
journal = {Mathematische Annalen},
volume = {132},
year = {1956},
pages = {336-345},
zbl = {0070.04801},
url = {http://dml.mathdoc.fr/item/GDZPPN00228507X}
}
ACKERMANN, W. Zur Axiomatik der Mengenlehre.. Mathematische Annalen, Tome 132 (1956) pp. 336-345. http://gdmltest.u-ga.fr/item/GDZPPN00228507X/