TY  - JOUR
AU  - V. A. Lyubetskii
TI  - The transition from deducibility in classical set theory to
JO  - Algebra i logika
PY  - 1991
SP  - 652
EP  - 670
VL  - 30
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1991_30_6_a2/
LA  - ru
ID  - AL_1991_30_6_a2
ER  -