TY - JOUR AU - V. F. Babenko TI - Extremal problems in approximation theory and inequalities for JO - Doklady Akademii Nauk PY - 1986 SP - 1033 EP - 1036 VL - 290 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1986_290_5_a0/ LA - ru ID - DAN_1986_290_5_a0 ER -