European Journal of Operational Research
European Journal of Operational Research > 2013 > 228 > 1 > 56-71
European Journal of Operational Research > 2016 > 251 > 2 > 369-386
European Journal of Operational Research > 2013 > 228 > 1 > 56-71
European Journal of Operational Research > 2016 > 251 > 2 > 369-386