%0 Journal Article %A V. B. Andreev %T On the Theory of Difference Schemes for Singularly Perturbed Equations %J Differencialʹnye uravneniâ %D 2004 %P 898-907 %V 40 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2004_40_7_a4/ %G ru %F DE_2004_40_7_a4