%0 Journal Article
%A G. M. Kesel'man
%A V. È. Lyantse
%T The expansion in principal functions of a nonselfadjoint differential operator of order $2n$ with spectral singularities
%J Differencialʹnye uravneniâ
%D 1970
%P 497-512
%V 6
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1970_6_3_a11/
%G ru
%F DE_1970_6_3_a11