European Journal of Operational Research
European Journal of Operational Research > 2018 > 264 > 1 > 138-148
European Journal of Operational Research > 2018 > 266 > 2 > 487-497
European Journal of Operational Research > 2018 > 264 > 1 > 138-148
European Journal of Operational Research > 2018 > 266 > 2 > 487-497