%0 Journal Article %A È. S. Belinskii %T Approximation by a~``floating'' system of exponentials on classes of periodic smooth functions %J Informatics and Automation %D 1987 %P 46-47 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a18/ %G ru %F TRSPY_1987_180_a18