Submitted on: 01 December 2011.
Revised on: 22 March 2012.
Accepted on: 20 April 2012.
___________________International Journal of Applied Mathematics and Computer Science
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Submitted on: 14 July 2021.
Revised on: 12 September 2021.
Accepted on: 13 October 2021.
___________________International Journal of Applied Mathematics and Computer Science
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Submitted on: 30 November 2011.
Revised on: 25 February 2012.
Accepted on: 13 March 2012.
___________________International Journal of Applied Mathematics and Computer Science
Submitted on: 17 April 2011.
Revised on: 18 July 2011.
Accepted on: 26 August 2011.
___________________International Journal of Applied Mathematics and Computer Science