@article{SLC_1987_18_a15,
     author = {Heinz L\"uneburg},
     title = {On a {Decomposition} of {Square} {Matrices} over a {Ring} with {Identity}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {18},
     year = {1987},
     url = {http://geodesic.mathdoc.fr/item/SLC_1987_18_a15/}
}