TY  - JOUR
AU  - A. R. Alimov
TI  - Preservation of approximative properties of subsets

JO  - Izvestiya. Mathematics 
PY  - 2006
SP  - 857
EP  - 866
VL  - 70
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_2006_70_5_a0/
LA  - en
ID  - IM2_2006_70_5_a0
ER  -