TY  - JOUR
AU  - L. L. Maksimova
TI  - Definability in Normal Extensions of S4
JO  - Algebra i logika
PY  - 2004
SP  - 387
EP  - 410
VL  - 43
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_2004_43_4_a0/
LA  - ru
ID  - AL_2004_43_4_a0
ER  -