@article{10_4064_fm_64_2_163_179,
     author = {M. Zuckerman},
     title = {On choosing subsets of n-element sets},
     journal = {Fundamenta Mathematicae},
     pages = {163--179},
     publisher = {mathdoc},
     volume = {64},
     number = {2},
     year = {1969},
     doi = {10.4064/fm-64-2-163-179},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-64-2-163-179/}
}