%0 Journal Article
%A S. M. Dolganova
%T The summation of principal vector expansions of certain nonselfadjoint differential operators
%J Differencialʹnye uravneniâ
%D 1968
%P 518-525
%V 4
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_3_a12/
%G ru
%F DE_1968_4_3_a12