Submitted on: 28 October 2001.
Revised on: 10 January 2002.
Accepted on: 01 February 2002.
___________________Journal of Mathematics Mechanics and Computer Science
Submitted on: 18 May 2022.
Revised on: 19 June 2022.
Accepted on: 16 August 2022.
___________________Journal of Mathematics Mechanics and Computer Science
Submitted on: 09 September 2012.
Revised on: 19 November 2012.
Accepted on: 03 December 2012.
___________________Journal of Mathematics Mechanics and Computer Science
Submitted on: 01 June 2017.
Revised on: 07 September 2017.
Accepted on: 10 October 2017.
___________________Journal of Mathematics Mechanics and Computer Science
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Submitted on: 24 December 2012.
Revised on: 23 March 2013.
Accepted on: 17 May 2013.
___________________Journal of Mathematics Mechanics and Computer Science