TY  - BOOK
AU  - Ausiello G
AU  - Crescenzi P
AU  - Gambosi G
AU  - Kann V
AU  - Marchetti-Spaccamela
AU  - Protasi M
TI  - Complexity and approximation: combinatorial optimization problems and their approximability properties
SN  - 3-540-65431-3
U1  - 519.3 
PY  - 1999///
CY  - Berlin
PB  - Springer-Verlag
KW  - Combinatorial optimization
ER  -