@article{GDZPPN00246991X, title = {The linear mapping of the En into itself.}, journal = {Monatshefte f\"ur Mathematik}, volume = {53}, year = {1949}, pages = {42-52}, zbl = {0034.15606}, url = {http://dml.mathdoc.fr/item/GDZPPN00246991X} }
Mayer, Walther. The linear mapping of the En into itself.. Monatshefte für Mathematik, Tome 53 (1949) pp. 42-52. http://gdmltest.u-ga.fr/item/GDZPPN00246991X/