@article{10_4153_CJM_1966_017_5,
     author = {Brualdi, Richard A.},
     title = {Term {Rank} of the {Direct} {Product} of {Matrices}},
     journal = {Canadian journal of mathematics},
     pages = {126--138},
     year = {1966},
     volume = {18},
     number = {1},
     doi = {10.4153/CJM-1966-017-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1966-017-5/}
}