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@article{PORMA_1962__21_3_114887, author = {Thompson, R.C.}, title = {On matrix commutators}, journal = {Portugaliae mathematica}, pages = {143--153}, publisher = {mathdoc}, volume = {21}, number = {3}, year = {1962}, mrnumber = {0147558}, zbl = {0107.02502}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1962__21_3_114887/} }
Thompson, R.C. On matrix commutators. Portugaliae mathematica, Tome 21 (1962) no. 3, pp. 143-153. http://geodesic.mathdoc.fr/item/PORMA_1962__21_3_114887/