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Control and Cybernetics > 2006 > Vol. 35, no 3 > 661-686
International Journal of Production Economics > 2004 > 92 > 1 > 1-10
Control and Cybernetics > 2006 > Vol. 35, no 3 > 661-686
International Journal of Production Economics > 2004 > 92 > 1 > 1-10