European Journal of Operational Research
European Journal of Operational Research > 2017 > 262 > 1 > 231-238
European Journal of Operational Research > 2017 > 262 > 2 > 792-801
European Journal of Operational Research > 2017 > 262 > 1 > 231-238
European Journal of Operational Research > 2017 > 262 > 2 > 792-801