Annals of Operations Research
Annals of Operations Research > 2012 > 195 > 1 > 189-220
Annals of Operations Research > 2012 > 196 > 1 > 459-468
Annals of Operations Research > 2012 > 195 > 1 > 189-220
Annals of Operations Research > 2012 > 196 > 1 > 459-468