@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/