TY  - JOUR
AU  - S. V. Belyi
AU  - È. R. Tsekanovskii
TI  - Classes of operator $R$-functions and their realization by conservative systems
JO  - Doklady Akademii Nauk
PY  - 1991
SP  - 441
EP  - 445
VL  - 321
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1991_321_3_a0/
LA  - ru
ID  - DAN_1991_321_3_a0
ER  -