%0 Journal Article %A Yu. P. Boglaev %T Numerical methods for solving singularly perturbed problems %J Differencialʹnye uravneniâ %D 1985 %P 1804-1806 %V 21 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1985_21_10_a24/ %G ru %F DE_1985_21_10_a24