Sarkis J (2001). “Ecoefficiency: How Data Envelopment Analysis Can Be Used by Managers and Researchers.? in Proceedings of the International Society for Optical Engineering, Society of Photo-Optical Instrumentation Engineers. 4193: 194-203.

Sarkis J (2001). “Ecoefficiency: How Data Envelopment Analysis Can Be Used by Managers and Researchers.? in Proceedings of the International Society for Optical Engineering, Society of Photo-Optical Instrumentation Engineers. 4193: 194-203.

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