European Journal of Operational Research
European Journal of Operational Research > 2005 > 160 > 1 > 34-46
European Journal of Operational Research > 2005 > 160 > 1 > 47-62
European Journal of Operational Research > 2005 > 165 > 1 > 127-138
European Journal of Operational Research > 2005 > 167 > 1 > 243-256