Cooper WW, B Gu and S Li (2001). “Comparisons and Evaluations of Alternative Approaches to the Treatment of Congestion in DEA.” EJOR 132(1): 62-74.

Cooper WW, B Gu and S Li (2001). “Comparisons and Evaluations of Alternative Approaches to the Treatment of Congestion in DEA.” EJOR 132(1): 62-74.

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