European Journal of Operational Research
European Journal of Operational Research > 2009 > 193 > 2 > 425-436
European Journal of Operational Research > 2014 > 236 > 1 > 382-394
European Journal of Operational Research > 2009 > 193 > 2 > 425-436
European Journal of Operational Research > 2014 > 236 > 1 > 382-394