@article{bwmeta1.element.bwnjournal-article-fmv20i1p7bwm,
author = {Felix Hausdorff},
title = {Zur Projektivit\"at der $$\delta$\_S$-Funktionen},
journal = {Fundamenta Mathematicae},
volume = {20},
year = {1933},
pages = {100-104},
zbl = {59.0885.01},
language = {deu},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv20i1p7bwm}
}
Hausdorff, Felix. Zur Projektivität der $δ_S$-Funktionen. Fundamenta Mathematicae, Tome 20 (1933) pp. 100-104. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv20i1p7bwm/