TY - JOUR AU - K. I. Oskolkov TI - Ridge Approximation, Chebyshev--Fourier Analysis and Optimal Quadrature Formulas JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1997 SP - 269 EP - 285 VL - 219 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1997_219_a18/ LA - ru ID - TM_1997_219_a18 ER -