TY - JOUR AU - V. F. Babenko TI - Nonsymetric approximations and inequalities for rearrangements in extremal problems of approximation theory JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1987 SP - 33 EP - 35 VL - 180 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1987_180_a10/ LA - ru ID - TM_1987_180_a10 ER -