%0 Journal Article
%A S. R. Umarov
%T Some boundary value problems for elliptic equations with a
%J Doklady Akademii Nauk
%D 1993
%P 708-710
%V 333
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1993_333_6_a5/
%G ru
%F DAN_1993_333_6_a5