TY  - BOOK
AU  - Ras, Zbigniew W.
AU  - Zemankova, Maria.
TI  - Intelligent systems : state of the art and future directio ns
T2  - Ellis Horwood series in Artificial Intelligence
SN  - 0134659317
U1  - 006.3 
PY  - 1990///
CY  - New York
PB  - Ellis-Horwood
ER  -