@article{05352058,
title = {Some inequalities of the Gr\"uss type for the numerical radius of bounded linear operators in Hilbert spaces.},
journal = {Journal of Inequalities and Applications [electronic only]},
volume = {2008},
year = {2008},
doi = {10.1155/2008/763102},
zbl = {1151.26321},
language = {en},
url = {http://dml.mathdoc.fr/item/05352058}
}
Dragomir, S.S. Some inequalities of the Grüss type for the numerical radius of bounded linear operators in Hilbert spaces.. Journal of Inequalities and Applications [electronic only], Tome 2008 (2008) . doi : 10.1155/2008/763102. http://gdmltest.u-ga.fr/item/05352058/