Zarafat AM, S Saati and M Mokhtaran (2003). “An Alternative Approach to Assignment Problem with Non-Homogeneous Costs Using Common Set of Weights in DEA.” Far East J Applied Mathematics. 1: 29-39.

Zarepisheh M, M Soleimani-damaneh and L Pourkarimi (2006). “Determination of Returns to Scale by CCR Formulation without Chasing Down Alternative Optimal Solutions.” Applied Mathematics Letters 19(9): 964-967.

Zavras AI, G Tsakos, C Economou and J Kyriopoulos (2002). “Using DEA to Evaluate Efficiency and Formulate Policy within a Greek National Primary Health Care Network.” J Medical Systems 26(4): 285-292.

Zeitsch J and D Lawrence (1996). “Decomposing Economic Inefficiency in Base-Load Power Plants.” JPA 7(4): 359-398.

Zelenyuk V (2006). “Aggregation of Malmquist Productivity Indexes.” EJOR 174(2): 1076-1086.

Zelenyuk V and V Zheka (2006). “Corporate Governance and Firm’s Efficiency: the Case of a Transitional Country, Ukraine.” JPA 25(1-2): 143-157.

Zeng X, Y Wu and D Zheng (2000). “Study of Stochastic DEA Model and its Application.” System Engineering Theory and Practice 20(6): 19-24.

Zeng Z, P Gu and M Zhang (2000). “Application of Data Envelopment Analysis in the Evaluation of Sustainable Development.” System Engineering Theory and Practice 20(8): 114-118.

Zenios CV, SA Zenios, K Agathocleous and AC Soteriou (1999). “Benchmarks of the Efficiency of Bank Branches.” Interfaces 29(3): 37-51.

Zanakis SH, C Alvarez and V Li (2007). “Socio-Economic Determinants of HIV/AIDS Pandemic and Nations Efficiencies.” EJOR 176(3): 1811-1838.