Collier DA, CE Collier and TM Kelly (2006). “Benchmarking Physician Performance, Part 1.” J Medical Practice Management 21(4): 185-189.

Cook WD, RH Green and J Zhu (2006). “Dual-Role Factors in Data Envelopment Analysis.” IIE Transactions 38(2): 105-115.

Collier DA, CE Collier and TM Kelly (2006). “Benchmarking Physician Performance, Part 2.” J Medical Practice Management 21(5): 273-279.

Colwell RJ and EP Davis (1992). “Output and Productivity in Banking ” Scandinavian J Economics 9.

Conka T and S Ercan (2005). “The Combined Decision Model for Selecting and Prioritizing Research and Development Projects.? in Proceedings of 2nd International Conference on Recent Advances in Space Technologies, IEEE: 823-828.

Conway RK, F Gollop and E Ball (1990). “New Productivity-Measurement Research.” American J Agricultural Economics 7: 1335-1335.

Cook WD, A. Kazakov and Y Roll (1994). “Measuring Efficiency of Highway Maintenance Patrols.? in Modeling Performance Measurement

Cook WD, K Alex, R Yaakov and MS Lawrence (1991). “A Data Envelopment Approach to Measuring Efficiency: Case Analysis of Highway Maintenance Patrols.” Socio-Econ Plan Sci 20(1): 83-103.

Cook WD and K Bala (2007). “Performance Measurement and Classification Data in DEA: Input-Oriented Model.” Omega 35(1): 39-52.

Cook WD, D Chai, J Doyle and R Green (1998). “Hierarchies and Groups in DEA.” JPA 10(2): 177-198.