%0 Journal Article
%A S. A. Aldashev
%T A Criterion for the Existence of Eigenfunctions of the Darboux--Protter Spectral Problem for 

%J Differencialʹnye uravneniâ
%D 2005
%P 795-801
%V 41
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2005_41_6_a9/
%G ru
%F DE_2005_41_6_a9