TY  - JOUR
AU  - V. V. V'yugin
TI  - Certain examples of upper semilattices of computable numerations
JO  - Algebra i logika
PY  - 1973
SP  - 512
EP  - 529
VL  - 12
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1973_12_5_a1/
LA  - ru
ID  - AL_1973_12_5_a1
ER  -