European Journal of Operational Research
European Journal of Operational Research > 1996 > 89 > 2 > 355-365
European Journal of Operational Research > 2003 > 149 > 2 > 430-437
European Journal of Operational Research > 1996 > 89 > 2 > 355-365
European Journal of Operational Research > 2003 > 149 > 2 > 430-437