%0 Journal Article %A A. V. Nesterov %T Modification of the method of boundary functions for singularly perturbed partial differential equations %J Matematičeskie zametki %D 1993 %P 57-64 %V 54 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1993_54_1_a4/ %G ru %F MZM_1993_54_1_a4