@article{10_4064_sm191_1_4,
     author = {Pascal Lef\`evre},
     title = {Essential norms of weighted composition operators
 on the space ${\cal H}^{\infty}$ of {Dirichlet} series},
     journal = {Studia Mathematica},
     pages = {57--66},
     year = {2009},
     volume = {191},
     number = {1},
     doi = {10.4064/sm191-1-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm191-1-4/}
}