European Journal of Operational Research
European Journal of Operational Research > 2013 > 224 > 1 > 52-64
European Journal of Operational Research > 2013 > 224 > 3 > 477-485
European Journal of Operational Research > 2013 > 224 > 1 > 52-64
European Journal of Operational Research > 2013 > 224 > 3 > 477-485