Morita H and S Nose (1994). “Fuzzy Categorical Variables in Data Envelopment Analysis.? in Proceedings of Symposium on Flexible Automation – a Pacific Rim Conference, Inst. Syst. Control & Inf. Eng. 2: 913-916.

Morita H and S Nose (1994). “Fuzzy Categorical Variables in Data Envelopment Analysis.? in Proceedings of Symposium on Flexible Automation – a Pacific Rim Conference, Inst. Syst. Control & Inf. Eng. 2: 913-916.

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