TY - JOUR AU - Yu. K. Dem'yanovich TI - Estimates of rate of convergence of best approximations by local functions JO - Zapiski Nauchnykh Seminarov POMI PY - 1976 SP - 22 EP - 37 VL - 58 UR - http://geodesic.mathdoc.fr/item/ZNSL_1976_58_a2/ LA - ru ID - ZNSL_1976_58_a2 ER -