TY  - JOUR
AU  - V. F. Babenko
AU  - S. A. Pichugov
TI  - An exact inequality for the derivative of a trigonometric polynomial having only real zeros
JO  - Matematičeskie zametki
PY  - 1986
SP  - 330
EP  - 336
VL  - 39
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1986_39_3_a3/
LA  - ru
ID  - MZM_1986_39_3_a3
ER  -