@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/