%0 Journal Article
%A V. A. Il'in
%T A system of classical eigenfunctions of a linear self-adjoint elliptic operator with discontinuous coefficients
%J Doklady Akademii Nauk
%D 1961
%P 272-275
%V 137
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1961_137_2_a5/
%G ru
%F DAN_1961_137_2_a5