%0 Journal Article %A Fuad Kittaneh %T A numerical radius inequality and an estimate for the numerical radius of the Frobenius companion matrix %J Studia Mathematica %D 2003 %P 11-17 %V 158 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm158-1-2/ %R 10.4064/sm158-1-2 %G en %F 10_4064_sm158_1_2