European Journal of Operational Research
European Journal of Operational Research > 2005 > 160 > 2 > 501-514
European Journal of Operational Research > 2005 > 162 > 2 > 532-551
European Journal of Operational Research > 2005 > 166 > 3 > 769-781
European Journal of Operational Research > 2005 > 167 > 2 > 518-542