TY  - JOUR
AU  - Fajmon, Břetislav
TI  - Operations, homomorphism and update versus relational database systems
JO  - Communications in Mathematics
PY  - 2000
SP  - 99
EP  - 109
VL  - 08
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/COMIM_2000__8_1_a9/
LA  - en
ID  - COMIM_2000__8_1_a9
ER  -