@article{SLC_2004-2007_52_a5,
     author = {Marc Fortin and Christophe Reutenauer},
     title = {Commutative/Noncommutative {Rank} of {Linear} {Matrices} and {Subspaces} of {Matrices} of {Low} {Rank}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {52},
     year = {2004-2007},
     url = {http://geodesic.mathdoc.fr/item/SLC_2004-2007_52_a5/}
}