@article{10_21136_MB_2001_134114,
     author = {Kr\'al, Josef and Medkov\'a, Dagmar},
     title = {Essential norms of the {Neumann} operator of the arithmetical mean},
     journal = {Mathematica Bohemica},
     pages = {669--690},
     publisher = {mathdoc},
     volume = {126},
     number = {4},
     year = {2001},
     doi = {10.21136/MB.2001.134114},
     mrnumber = {1869461},
     zbl = {0998.31003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2001.134114/}
}