By Anderson L.R.   Rodgers Y.V.   Rodriguez R.R.   in Economics Letters

ISSN:0165-1765|69|1|45-54

Elsevier‎(2000)‎

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By Rodriguez R. R.   Ortiz A.   Alfaro J. J.   in International Journal of Computer Integrated Manufacturing

ISSN:1362-3052|22|5|385-394

Taylor & Francis Ltd‎(2009)‎

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