TY - JOUR AU - A. V. Nesterov TI - Modification of the method of boundary functions for singularly perturbed partial differential equations JO - Matematičeskie zametki PY - 1993 SP - 57 EP - 64 VL - 54 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1993_54_1_a4/ LA - ru ID - MZM_1993_54_1_a4 ER -