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Submitted on: 01 August 2002.
Revised on: 09 November 2002.
Accepted on: 26 December 2002.
___________________Applied System Innovation---MDPI
Submitted on: 17 September 2018.
Revised on: 13 November 2018.
Accepted on: 30 December 2018.
___________________Applied System Innovation---MDPI
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Submitted on: 31 October 2003.
Revised on: 05 January 2004.
Accepted on: 03 March 2004.
___________________Applied System Innovation---MDPI
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