%0 Journal Article
%A A. I. Achil'diev
%T The first and second boundary-value problems for elliptic equations which are degenerate at a finite number of interior points
%J Doklady Akademii Nauk
%D 1963
%P 13-16
%V 152
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_152_1_a1/
%G ru
%F DAN_1963_152_1_a1