European Journal of Operational Research
European Journal of Operational Research > 2017 > 257 > 3 > 896-906
European Journal of Operational Research > 2017 > 258 > 1 > 398-400
European Journal of Operational Research > 2017 > 262 > 1 > 231-238
European Journal of Operational Research > 2017 > 263 > 2 > 733-735