%0 Journal Article
%A A. I. Vahabov
%T Fourier series expansions in principal functions of an elliptic operator
%J Differencialʹnye uravneniâ
%D 1987
%P 1736-1745
%V 23
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1987_23_10_a9/
%G ru
%F DE_1987_23_10_a9