@article{01614335,
title = {A note on the ranks of set-inclusion matrices.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {8},
year = {2001},
zbl = {0976.15003},
language = {en},
url = {http://dml.mathdoc.fr/item/01614335}
}
de Caen, D. A note on the ranks of set-inclusion matrices.. The Electronic Journal of Combinatorics [electronic only], Tome 8 (2001) . http://gdmltest.u-ga.fr/item/01614335/