%0 Journal Article
%A O. F. Mikulina
%T Expansion in the eigenfunctions of a second order partial differential equation of polar type in the case of the whole plane
%J Differencialʹnye uravneniâ
%D 1974
%P 550-552
%V 10
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1974_10_3_a19/
%G ru
%F DE_1974_10_3_a19