Computers & Operations Research
Computers and Operations Research > 2009 > 36 > 7 > 2311-2319
Computers and Operations Research > 2009 > 36 > 7 > 2160-2172
Computers and Operations Research > 2009 > 36 > 10 > 2763-2772
Computers and Operations Research > 2009 > 36 > 11 > 3041-3050