TY  - JOUR
AU  - S. F. Prokoptsev
TI  - Some properties of linear combinations of functions close to exponential functions
JO  - Doklady Akademii Nauk
PY  - 1971
SP  - 1018
EP  - 1021
VL  - 199
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1971_199_5_a8/
LA  - ru
ID  - DAN_1971_199_5_a8
ER  -