European Journal of Operational Research
European Journal of Operational Research > 2005 > 160 > 3 > 851-876
European Journal of Operational Research > 2005 > 164 > 1 > 217-224
European Journal of Operational Research > 2005 > 165 > 3 > 685-695
European Journal of Operational Research > 2005 > 166 > 1 > 115-132