European Journal of Operational Research
European Journal of Operational Research > 2005 > 165 > 3 > 794-809
European Journal of Operational Research > 2005 > 165 > 3 > 668-684
European Journal of Operational Research > 2005 > 165 > 3 > 794-809
European Journal of Operational Research > 2005 > 165 > 3 > 668-684