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@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/} }
Per Sjölin. Norm Inequalities for Spherical Means.. Monatshefte für Mathematik, Tome 100 (1985), pp. 153-162. http://geodesic.mathdoc.fr/item/MOMA_1985__100_178246/