European Journal of Operational Research
European Journal of Operational Research > 2005 > 163 > 3 > 784-801
European Journal of Operational Research > 2005 > 166 > 2 > 547-556
European Journal of Operational Research > 2005 > 163 > 3 > 784-801
European Journal of Operational Research > 2005 > 166 > 2 > 547-556