%0 Journal Article
%A Yu. A. Brudnyi
%T Criteria for the existence of derivatives in $L^p$
%J Sbornik. Mathematics
%D 1967
%P 35-55
%V 2
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1967_2_1_a3/
%G en
%F SM_1967_2_1_a3