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Submitted on: 17 November 2009.
Revised on: 27 February 2010.
Accepted on: 24 April 2010.
___________________Journal of Computational Methods in Sciences and Engineering
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Submitted on: 04 June 2013.
Revised on: 24 August 2013.
Accepted on: 15 October 2013.
___________________Journal of Computational Methods in Sciences and Engineering
Submitted on: 31 July 2017.
Revised on: 18 November 2017.
Accepted on: 13 December 2017.
___________________Journal of Computational Methods in Sciences and Engineering
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