@article{SF_1992__44_1_135164,
     author = {J. Konieczny},
     title = {On cardinalities  of row spaces of {Boolean} matrices.},
     journal = {Semigroup forum},
     pages = {393--402},
     year = {1992},
     volume = {44},
     number = {1},
     zbl = {0747.20033},
     url = {http://geodesic.mathdoc.fr/item/SF_1992__44_1_135164/}
}