TY - JOUR AU - S. B. Vakarchuk AU - A. N. Shchitov TI - Estimates for the error of approximation of functions in $L_p^1$ by polynomials JO - Izvestiya. Mathematics PY - 2015 SP - 257 EP - 287 VL - 79 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_2015_79_2_a2/ LA - en ID - IM2_2015_79_2_a2 ER -