TY  - JOUR
AU  - V. B. Shehtman
TI  - On squares of modal logics with additional connectives
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 2011
SP  - 343
EP  - 351
VL  - 274
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM_2011_274_a19/
LA  - ru
ID  - TM_2011_274_a19
ER  -