%0 Journal Article %A Tord Sjödin %T On $L^{p}$-differentiability and difference properties of functions %J Studia Mathematica %D 1982 %P 153-168 %V 74 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-74-2-153-168/ %R 10.4064/sm-74-2-153-168 %G en %F 10_4064_sm_74_2_153_168