@article{GDZPPN00228698X, title = {n-Commutative Matrices.}, journal = {Mathematische Annalen}, volume = {136}, year = {1958}, pages = {343-347}, language = {en}, url = {http://dml.mathdoc.fr/item/GDZPPN00228698X} }
Friedman, B. n-Commutative Matrices.. Mathematische Annalen, Tome 136 (1958) pp. 343-347. http://gdmltest.u-ga.fr/item/GDZPPN00228698X/