TY  - JOUR
AU  - D. L. Berman
TI  - Extremal properties in the theory of polynomial operators
JO  - Doklady Akademii Nauk
PY  - 1961
SP  - 747
EP  - 750
VL  - 138
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1961_138_4_a1/
LA  - ru
ID  - DAN_1961_138_4_a1
ER  -