TY  - JOUR
AU  - V. I. Amstislavskii
TI  - Set-theoretic operations and recursive hierarchies
JO  - Doklady Akademii Nauk
PY  - 1966
SP  - 995
EP  - 998
VL  - 169
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1966_169_5_a1/
LA  - ru
ID  - DAN_1966_169_5_a1
ER  -