@article{CMJ_2002_52_4_a5,
     author = {Bo, Zhou},
     title = {Generalized indices of {Boolean} matrices},
     journal = {Czechoslovak Mathematical Journal},
     pages = {731--738},
     year = {2002},
     volume = {52},
     number = {4},
     mrnumber = {1940054},
     zbl = {1014.15012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2002_52_4_a5/}
}