%0 Journal Article %A Ī. Ī. Lazurchak %T A Two-Sided Method for the First Boundary Value Problem for Singular Ordinary Differential Equations %J Differencialʹnye uravneniâ %D 2001 %P 547-557 %V 37 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2001_37_4_a13/ %G ru %F DE_2001_37_4_a13