TY  - JOUR
AU  - G. A. Isaev
AU  - T. Yu. Kuliev
TI  - Analytic properties of the boundary of the numerical range of
JO  - Doklady Akademii Nauk
PY  - 1986
SP  - 1050
EP  - 1053
VL  - 291
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1986_291_5_a5/
LA  - ru
ID  - DAN_1986_291_5_a5
ER  -