Annals of Operations Research
Annals of Operations Research > 2012 > 196 > 1 > 111-136
Annals of Operations Research > 2012 > 201 > 1 > 63-81
Annals of Operations Research > 2012 > 196 > 1 > 111-136
Annals of Operations Research > 2012 > 201 > 1 > 63-81