European Journal of Operational Research
European Journal of Operational Research > 2017 > 257 > 2 > 483-493
European Journal of Operational Research > 2017 > 258 > 1 > 254-263
European Journal of Operational Research > 2017 > 258 > 1 > 58-69
European Journal of Operational Research > 2017 > 260 > 2 > 514-519