%0 Journal Article %A W. Jurkat %A J. Troutman %T A mean value inequality for positive integral transformations with application to a maximal theorem %J Studia Mathematica %D 1981 %P 227-233 %V 69 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-69-3-227-233/ %R 10.4064/sm-69-3-227-233 %G en %F 10_4064_sm_69_3_227_233