TY  - JOUR
AU  - D. P. Skvortsov
TI  - Realizability and finite validity of propositional formulas with restrictions on the occurrence of implication
JO  - Matematičeskie zametki
PY  - 1979
SP  - 919
EP  - 931
VL  - 25
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1979_25_6_a10/
LA  - ru
ID  - MZM_1979_25_6_a10
ER  -