TY - JOUR AU - B. S. Kashin TI - On approximation properties of complete orthonormal systems JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1985 SP - 187 EP - 191 VL - 172 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1985_172_a12/ LA - ru ID - TM_1985_172_a12 ER -