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European Journal of Operational Research > 2007 > 181 > 1 > 390-402
European Journal of Operational Research > 2005 > 166 > 3 > 828-842
European Journal of Operational Research > 2005 > 160 > 2 > 395-415
European Journal of Operational Research > 2007 > 181 > 1 > 390-402
European Journal of Operational Research > 2005 > 166 > 3 > 828-842
European Journal of Operational Research > 2005 > 160 > 2 > 395-415