European Journal of Operational Research
European Journal of Operational Research > 2005 > 160 > 2 > 380-394
European Journal of Operational Research > 2005 > 162 > 2 > 450-467
European Journal of Operational Research > 2005 > 163 > 1 > 170-176
European Journal of Operational Research > 2005 > 164 > 3 > 760-777
European Journal of Operational Research > 2005 > 166 > 3 > 655-665