@article{MOMA_1985__100_178246,
     author = {Per Sj\"olin},
     title = {Norm {Inequalities} for {Spherical} {Means.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {153--162},
     publisher = {mathdoc},
     volume = {100},
     year = {1985},
     zbl = {0569.42010},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1985__100_178246/}
}