TY  - JOUR
AU  - L. G. Tonoyan
TI  - On the some extremal problem
JO  - Proceedings of the Yerevan State University. Physical and mathematical sciences
PY  - 2002
SP  - 7
EP  - 11
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/UZERU_2002_3_a1/
LA  - ru
ID  - UZERU_2002_3_a1
ER  -