TY  - JOUR
AU  - N. I. Dubrovin
TI  - Formal sums and power series over a~group
JO  - Sbornik. Mathematics
PY  - 2000
SP  - 955
EP  - 971
VL  - 191
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2000_191_7_a1/
LA  - en
ID  - SM_2000_191_7_a1
ER  -