European Journal of Operational Research
European Journal of Operational Research > 2008 > 184 > 1 > 63-75
European Journal of Operational Research > 2008 > 187 > 1 > 31-45
European Journal of Operational Research > 2008 > 191 > 2 > 577-581
European Journal of Operational Research > 2008 > 184 > 1 > 63-75
European Journal of Operational Research > 2008 > 187 > 1 > 31-45
European Journal of Operational Research > 2008 > 191 > 2 > 577-581