TY  - JOUR
AU  - A. V. Kolushov
TI  - On differentiability of the operator of best approximation by rational fractions
JO  - Doklady Akademii Nauk
PY  - 1982
SP  - 1060
EP  - 1062
VL  - 264
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1982_264_5_a7/
LA  - ru
ID  - DAN_1982_264_5_a7
ER  -