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European Journal of Operational Research > 2011 > 210 > 2 > 336-343
European Journal of Operational Research > 2010 > 200 > 3 > 881-892
European Journal of Operational Research > 1995 > 84 > 3 > 681-692
European Journal of Operational Research > 2011 > 210 > 2 > 336-343
European Journal of Operational Research > 2010 > 200 > 3 > 881-892
European Journal of Operational Research > 1995 > 84 > 3 > 681-692