TY - JOUR AU - È. M. Galeev TI - Approximation of certain classes of periodic functions of several variables by Fourier sums in the $\widetilde{\mathscr L}_p$ metric JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1977 VL - 32 IS - 4 UR - http://geodesic.mathdoc.fr/item/RM_1977_32_4_a7/ LA - ru ID - RM_1977_32_4_a7 ER -