TY  - JOUR
AU  - A. V. Altaev
TI  - Operators defined by $\gamma$-enumeration and related reducibilities
JO  - Doklady Akademii Nauk
PY  - 1974
SP  - 961
EP  - 963
VL  - 216
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1974_216_5_a0/
LA  - ru
ID  - DAN_1974_216_5_a0
ER  -