European Journal of Operational Research
European Journal of Operational Research > 2012 > 220 > 1 > 171-181
European Journal of Operational Research > 2012 > 220 > 1 > 106-114
European Journal of Operational Research > 2012 > 220 > 2 > 539-549
European Journal of Operational Research > 2012 > 220 > 2 > 370-377
European Journal of Operational Research > 2012 > 220 > 3 > 610-618