TY  - JOUR
AU  - V. V. Rybakov
TI  - Noncompact extensions of the logic ${\rm S}4$
JO  - Algebra i logika
PY  - 1977
SP  - 472
EP  - 490
VL  - 16
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1977_16_4_a8/
LA  - ru
ID  - AL_1977_16_4_a8
ER  -