Cook WD, A Kazakov and Y Roll (1995). “On the Measurement and Monitoring of Relative Efficiency of Highway Maintenance Patrol.” in Charnes A, WW Cooper, AY Lewin and LM Seiford (eds.) Data Envelopment Analysts: Theory, Methodology, and Applications, Kluwer.

Cook WD, A Kazakov and Y Roll (1995). “On the Measurement and Monitoring of Relative Efficiency of Highway Maintenance Patrol.” in Charnes A, WW Cooper, AY Lewin and LM Seiford (eds.) Data Envelopment Analysts: Theory, Methodology, and Applications, Kluwer.

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