TY  - JOUR
AU  - E. A. Sopkina
TI  - On the sum of roots of a closed set
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 2002
SP  - 277
EP  - 286
VL  - 289
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_2002_289_a15/
LA  - ru
ID  - ZNSL_2002_289_a15
ER  -