TY  - JOUR
AU  - I. A. Kazakov
TI  - A formalization of the Codd algebra operations in logic $\mathcal{SHOIN}(D)$
JO  - The Bulletin of Irkutsk State University. Series Mathematics
PY  - 2011
SP  - 68
EP  - 73
VL  - 4
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IIGUM_2011_4_3_a5/
LA  - ru
ID  - IIGUM_2011_4_3_a5
ER  -