%0 Journal Article %A L. Gordon %T Perron's integral for derivatives in $L^{r}$ %J Studia Mathematica %D 1966 %P 295-316 %V 28 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-28-3-295-316/ %R 10.4064/sm-28-3-295-316 %G en %F 10_4064_sm_28_3_295_316