@article{10_4153_CMB_1989_007_x,
     author = {Siddiqi, Jamil A. and Elkoutri, Abdelkader},
     title = {Norm {Inequalities} for {Generators} of {Analytic} {Semigroups} and {Cosine} {Operator} {Functions}},
     journal = {Canadian mathematical bulletin},
     pages = {47--53},
     year = {1989},
     volume = {32},
     number = {1},
     doi = {10.4153/CMB-1989-007-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1989-007-x/}
}