Sugiyama M, T Sueyoshi and Y Y. (1995). ?DEA/DR Method for DMU Classification.” Operations Research: Communications of Operations Research Society of Japan 40(12): 696-700.

Sugiyama M, T Sueyoshi and Y Y. (1995). ?DEA/DR Method for DMU Classification.” Operations Research: Communications of Operations Research Society of Japan 40(12): 696-700.

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