@article{bwmeta1.element.bwnjournal-article-fmv64i1p12bwm,
author = {M. Zuckerman},
title = {On choosing subsets of n-element sets},
journal = {Fundamenta Mathematicae},
volume = {64},
year = {1969},
pages = {163-179},
zbl = {0175.27006},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv64i1p12bwm}
}
Zuckerman, M. On choosing subsets of n-element sets. Fundamenta Mathematicae, Tome 64 (1969) pp. 163-179. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv64i1p12bwm/