%0 Journal Article
%A A. G. Kostyuchenko
%T On the spectral properties of elliptical operators
%J Doklady Akademii Nauk
%D 1957
%P 34-37
%V 115
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1957_115_1_a7/
%G ru
%F DAN_1957_115_1_a7