@article{10_4064_sm_69_3_227_233,
     author = {W. Jurkat and J. Troutman},
     title = {A mean value inequality for positive integral transformations with application to a maximal theorem},
     journal = {Studia Mathematica},
     pages = {227--233},
     year = {1981},
     volume = {69},
     number = {3},
     doi = {10.4064/sm-69-3-227-233},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-69-3-227-233/}
}