TY  - JOUR
AU  - È. S. Belinskii
TI  - Two extremal problems for trigonometric polynomials with a prescribed number of harmonics
JO  - Matematičeskie zametki
PY  - 1991
SP  - 12
EP  - 18
VL  - 49
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1991_49_1_a1/
LA  - ru
ID  - MZM_1991_49_1_a1
ER  -