TY  - JOUR
AU  - R. I. Grigorchuk
TI  - Ergodic theorems for the actions of a~free group and a~free semigroup
JO  - Matematičeskie zametki
PY  - 1999
SP  - 779
EP  - 783
VL  - 65
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1999_65_5_a14/
LA  - ru
ID  - MZM_1999_65_5_a14
ER  -