European Journal of Operational Research
European Journal of Operational Research > 2018 > 266 > 2 > 554-568
European Journal of Operational Research > 2018 > 271 > 2 > 561-576
European Journal of Operational Research > 2018 > 266 > 2 > 554-568
European Journal of Operational Research > 2018 > 271 > 2 > 561-576