Submitted on: 25 July 2001.
Revised on: 01 November 2001.
Accepted on: 28 December 2001.
___________________JOURNAL OF INFORMATION TECHNOLOGY
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Submitted on: 24 October 1998.
Revised on: 17 January 1999.
Accepted on: 18 March 1999.
___________________JOURNAL OF INFORMATION TECHNOLOGY
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Submitted on: 31 May 2015.
Revised on: 25 August 2015.
Accepted on: 17 September 2015.
___________________JOURNAL OF INFORMATION TECHNOLOGY
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