Submitted on: 20 August 1998.
Revised on: 12 October 1998.
Accepted on: 05 December 1998.
___________________JOURNAL OF COMPUTER AND SYSTEMS SCIENCES INTERNATIONAL
Submitted on: 08 February 2000.
Revised on: 15 May 2000.
Accepted on: 29 May 2000.
___________________JOURNAL OF COMPUTER AND SYSTEMS SCIENCES INTERNATIONAL
Submitted on: 19 July 2012.
Revised on: 12 November 2012.
Accepted on: 11 January 2013.
___________________JOURNAL OF COMPUTER AND SYSTEMS SCIENCES INTERNATIONAL
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Submitted on: 02 January 2020.
Revised on: 19 February 2020.
Accepted on: 19 March 2020.
___________________JOURNAL OF COMPUTER AND SYSTEMS SCIENCES INTERNATIONAL
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Submitted on: 17 December 2004.
Revised on: 26 January 2005.
Accepted on: 03 March 2005.
___________________JOURNAL OF COMPUTER AND SYSTEMS SCIENCES INTERNATIONAL