European Journal of Operational Research
European Journal of Operational Research > 2006 > 174 > 2 > 874-886
European Journal of Operational Research > 2008 > 185 > 3 > 1351-1374
European Journal of Operational Research > 2006 > 174 > 2 > 874-886
European Journal of Operational Research > 2008 > 185 > 3 > 1351-1374