TY - JOUR AU - V. N. Gabushin TI - On Optimal Recovery of Differentiation Operator JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1997 SP - 125 EP - 129 VL - 219 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1997_219_a9/ LA - ru ID - TM_1997_219_a9 ER -