@article{2104,
author = {von Neumann, John},
title = {Approximative properties of matrices of high finite order},
journal = {Portugaliae mathematica},
volume = {3},
year = {1942},
pages = {1-62},
zbl = {0026.23302},
mrnumber = {0006137},
language = {en},
url = {http://dml.mathdoc.fr/item/2104}
}
von Neumann, John. Approximative properties of matrices of high finite order. Portugaliae mathematica, Tome 3 (1942) pp. 1-62. http://gdmltest.u-ga.fr/item/2104/