%0 Journal Article %A Siddiqi, Jamil A. %A Elkoutri, Abdelkader %T Norm Inequalities for Generators of Analytic Semigroups and Cosine Operator Functions %J Canadian mathematical bulletin %D 1989 %P 47-53 %V 32 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1989-007-x/ %R 10.4153/CMB-1989-007-x %F 10_4153_CMB_1989_007_x