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Submitted on: 28 July 2003.
Revised on: 18 August 2003.
Accepted on: 30 September 2003.
___________________Computers & Industrial Engineering
Submitted on: 13 July 1998.
Revised on: 04 October 1998.
Accepted on: 26 November 1998.
___________________Computers & Industrial Engineering
Submitted on: 08 March 2003.
Revised on: 18 April 2003.
Accepted on: 17 May 2003.
___________________Computers & Industrial Engineering
Submitted on: 08 October 2018.
Revised on: 09 January 2019.
Accepted on: 25 January 2019.
___________________Computers & Industrial Engineering
Submitted on: 16 December 2017.
Revised on: 25 March 2018.
Accepted on: 20 May 2018.
___________________Computers & Industrial Engineering
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