TY  - JOUR
AU  - P. L. Ul'yanov
TI  - Classes of infinitely differentiable functions
JO  - Doklady Akademii Nauk
PY  - 1989
SP  - 287
EP  - 290
VL  - 305
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1989_305_2_a7/
LA  - ru
ID  - DAN_1989_305_2_a7
ER  -