Computers & Operations Research
Computers and Operations Research > 2009 > 36 > 2 > 358-378
Computers and Operations Research > 2009 > 36 > 2 > 597-611
Computers and Operations Research > 2009 > 36 > 2 > 358-378
Computers and Operations Research > 2009 > 36 > 2 > 597-611