TY  - BOOK
AU  - Kacprzyk J
AU  -  Orlovski S A
TI  - Optimization models using fuzzy sets and possibility theory
T2  - Theory and decision library series; B
U1  - B28931, M7 
PY  - 1987///
CY  - Dordrecht
PB  - D Reidel        
KW  - Optimization theory
ER  -