%0 Journal Article %A B. S. Kashin %T On trigonometric polynomials with coefficients $+1$, $-1$,~$0$ %J Informatics and Automation %D 1987 %P 131-132 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a73/ %G ru %F TRSPY_1987_180_a73