TY - JOUR AU - S. L. Edelstein TI - Operator analogs of VKB-type estimates and the solvability of boundary-value problems JO - Matematičeskie zametki PY - 1992 SP - 124 EP - 131 VL - 51 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1992_51_4_a16/ LA - ru ID - MZM_1992_51_4_a16 ER -