TY  - JOUR
AU  - A. B. Khutoretskii
TI  - The power of the upper semilattice of computable numerations
JO  - Algebra i logika
PY  - 1971
SP  - 561
EP  - 569
VL  - 10
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1971_10_5_a6/
LA  - ru
ID  - AL_1971_10_5_a6
ER  -