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Submitted on: 19 July 2011.
Revised on: 10 August 2011.
Accepted on: 23 August 2011.
___________________Journal of Applied Mathematics and Computing
Submitted on: 05 September 2002.
Revised on: 26 September 2002.
Accepted on: 21 October 2002.
___________________Journal of Applied Mathematics and Computing
Submitted on: 03 November 2018.
Revised on: 25 January 2019.
Accepted on: 23 February 2019.
___________________Journal of Applied Mathematics and Computing
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Submitted on: 05 August 2020.
Revised on: 29 September 2020.
Accepted on: 12 November 2020.
___________________Journal of Applied Mathematics and Computing
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Submitted on: 15 August 2015.
Revised on: 08 October 2015.
Accepted on: 19 October 2015.
___________________Journal of Applied Mathematics and Computing
Submitted on: 15 May 2016.
Revised on: 30 June 2016.
Accepted on: 22 July 2016.
___________________Journal of Applied Mathematics and Computing