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Cybernetics and Systems Analysis > 2008 > 44 > 1 > 125-138
Annals of Operations Research > 2006 > 148 > 1 > 227-250
Cybernetics and Systems Analysis > 2008 > 44 > 1 > 125-138
Annals of Operations Research > 2006 > 148 > 1 > 227-250