TY  - JOUR
AU  - P. V. Yagodovskii
TI  - $\sigma$-Extensions of discrete multivalued groups
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 2005
SP  - 225
EP  - 242
VL  - 325
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_2005_325_a12/
LA  - ru
ID  - ZNSL_2005_325_a12
ER  -