TY  - JOUR
AU  - P. L. Ul'yanov
TI  - On~classes of infinitely differentiable functions
JO  - Sbornik. Mathematics
PY  - 1991
SP  - 11
EP  - 30
VL  - 70
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1991_70_1_a1/
LA  - en
ID  - SM_1991_70_1_a1
ER  -