@article{10_21136_CMJ_1990_102419,
     author = {Brualdi, Richard A. and Liu, Bo Lian},
     title = {Hall exponents of {Boolean} matrices},
     journal = {Czechoslovak Mathematical Journal},
     pages = {659--670},
     publisher = {mathdoc},
     volume = {40},
     number = {4},
     year = {1990},
     doi = {10.21136/CMJ.1990.102419},
     mrnumber = {1084901},
     zbl = {0737.05028},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1990.102419/}
}