TY  - JOUR
AU  - A. P. Akimov
TI  - On imbeddings of classical modal calculi in constructive calculi
JO  - Doklady Akademii Nauk
PY  - 1979
SP  - 777
EP  - 778
VL  - 247
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1979_247_4_a0/
LA  - ru
ID  - DAN_1979_247_4_a0
ER  -