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Submitted on: 08 January 2006.
Revised on: 04 February 2006.
Accepted on: 15 February 2006.
___________________ADVANCED ENGINEERING INFORMATICS
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Submitted on: 20 February 2009.
Revised on: 07 June 2009.
Accepted on: 12 July 2009.
___________________ADVANCED ENGINEERING INFORMATICS
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