%0 Journal Article
%A V. G. Maz'ya
%T On a~degenerating problem with directional derivative
%J Sbornik. Mathematics
%D 1972
%P 429-469
%V 16
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1972_16_3_a7/
%G en
%F SM_1972_16_3_a7