Sinauany-Stern Z and L Friedman (1998). ?DEA and the Discriminant Analysis of Ratios for Ranking Units.” EJOR 111(3): 470-478.

Sinauany-Stern Z and L Friedman (1998). ?DEA and the Discriminant Analysis of Ratios for Ranking Units.” EJOR 111(3): 470-478.

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