%0 Journal Article
%A V. A. Kondrat'ev
%A S. D. Èidel'man
%T On conditions on the boundary surface in the theory of elliptic boundary value problems
%J Doklady Akademii Nauk
%D 1979
%P 812-815
%V 246
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1979_246_4_a11/
%G ru
%F DAN_1979_246_4_a11