Annals of Operations Research
Annals of Operations Research > 2012 > 193 > 1 > 221-253
Annals of Operations Research > 2012 > 200 > 1 > 171-182
Annals of Operations Research > 2012 > 193 > 1 > 221-253
Annals of Operations Research > 2012 > 200 > 1 > 171-182