TY - JOUR AU - S. B. Stechkin AU - S. A. Telyakovskii TI - The approximation of differentiable functions by trigonometric polynomials in the $L$~metric JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1967 SP - 20 EP - 29 VL - 88 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1967_88_a2/ LA - ru ID - TM_1967_88_a2 ER -