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Submitted on: 21 February 2018.
Revised on: 13 April 2018.
Accepted on: 05 May 2018.
___________________International Journal of Numerical Analysis and Modeling
Submitted on: 21 December 2002.
Revised on: 23 March 2003.
Accepted on: 16 April 2003.
___________________International Journal of Numerical Analysis and Modeling
Submitted on: 11 August 2017.
Revised on: 22 October 2017.
Accepted on: 10 November 2017.
___________________International Journal of Numerical Analysis and Modeling
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