%0 Journal Article
%A Yu. S. Shatalov
%T A certain method of investigating singular problems
%J Differencialʹnye uravneniâ
%D 1968
%P 2215-2229
%V 4
%N 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_12_a6/
%G ru
%F DE_1968_4_12_a6