TY  - JOUR
AU  - B. S. Kashin
TI  - On trigonometric polynomials with coefficients $+1$, $-1$,~$0$
JO  - Informatics and Automation
PY  - 1987
SP  - 131
EP  - 132
VL  - 180
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a73/
LA  - ru
ID  - TRSPY_1987_180_a73
ER  -