TY - JOUR AU - N. M. Leontovich TI - The asymptotic expansion of boundary value problems for partial differential equations JO - Doklady Akademii Nauk PY - 1960 SP - 742 EP - 745 VL - 131 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1960_131_4_a6/ LA - ru ID - DAN_1960_131_4_a6 ER -