@article{2311,
author = {Putnam, C.R.},
title = {Commutators and normal operators},
journal = {Portugaliae mathematica},
volume = {17},
year = {1958},
pages = {59-62},
zbl = {0151.20102},
mrnumber = {0098989},
language = {en},
url = {http://dml.mathdoc.fr/item/2311}
}
Putnam, C.R. Commutators and normal operators. Portugaliae mathematica, Tome 17 (1958) pp. 59-62. http://gdmltest.u-ga.fr/item/2311/