TY  - JOUR
AU  - I. V. Belyakov
TI  - Extremal Properties of Certain Trigonometric Functions and Chebyshev Polynomials
JO  - Matematičeskie zametki
PY  - 2006
SP  - 350
EP  - 355
VL  - 80
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2006_80_3_a3/
LA  - ru
ID  - MZM_2006_80_3_a3
ER  -