%0 Journal Article
%A P. I. Lizorkin
%A S. M. Nikol'skii
%T Elliptic equations with degeneracy. Differential properties of solutions
%J Doklady Akademii Nauk
%D 1981
%P 278-282
%V 257
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1981_257_2_a4/
%G ru
%F DAN_1981_257_2_a4