Submitted on: 04 July 2008.
Revised on: 13 August 2008.
Accepted on: 11 September 2008.
___________________Cybernetics and Information Technologies
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Submitted on: 01 March 2012.
Revised on: 03 May 2012.
Accepted on: 11 June 2012.
___________________Cybernetics and Information Technologies
Submitted on: 25 September 1999.
Revised on: 09 November 1999.
Accepted on: 11 December 1999.
___________________Cybernetics and Information Technologies
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Submitted on: 01 May 2010.
Revised on: 02 July 2010.
Accepted on: 13 August 2010.
___________________Cybernetics and Information Technologies
Submitted on: 08 January 2009.
Revised on: 29 April 2009.
Accepted on: 20 June 2009.
___________________Cybernetics and Information Technologies
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Submitted on: 14 August 2010.
Revised on: 03 October 2010.
Accepted on: 15 November 2010.
___________________Cybernetics and Information Technologies
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