European Journal of Operational Research
European Journal of Operational Research > 2015 > 241 > 3 > 851-862
European Journal of Operational Research > 2015 > 241 > 3 > 642-652
European Journal of Operational Research > 2015 > 241 > 3 > 851-862
European Journal of Operational Research > 2015 > 241 > 3 > 642-652