How to cite this article:
A. Ashrafi and A.B. Jaafar, 2011. Performance Measurement of Two-Stage Production Systems with Undesirable Factors by Data Envelopment Analysis. Journal of Applied Sciences, 11: 3515-3519. DOI: 10.3923/jas.2011.3515.3519 URL: https://scialert.net/abstract/?doi=jas.2011.3515.3519
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