TY  - JOUR
AU  - G. R. Belitskii
TI  - Normal forms for formal series and germs of $C^\infty$-mappings with respect to the action of a~group
JO  - Izvestiya. Mathematics 
PY  - 1976
SP  - 809
EP  - 821
VL  - 10
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1976_10_4_a8/
LA  - en
ID  - IM2_1976_10_4_a8
ER  -