Submitted on: 17 January 2016.
Revised on: 03 May 2016.
Accepted on: 22 June 2016.
___________________Applied Numerical Mathematics---ELSEVIER
Submitted on: 13 May 2018.
Revised on: 25 August 2018.
Accepted on: 19 September 2018.
___________________Applied Numerical Mathematics---ELSEVIER
Submitted on: 17 September 1998.
Revised on: 10 October 1998.
Accepted on: 21 November 1998.
___________________Applied Numerical Mathematics---ELSEVIER
Submitted on: 19 April 2019.
Revised on: 20 May 2019.
Accepted on: 19 June 2019.
___________________Applied Numerical Mathematics---ELSEVIER
Submitted on: 19 May 2018.
Revised on: 28 July 2018.
Accepted on: 18 September 2018.
___________________Applied Numerical Mathematics---ELSEVIER
Submitted on: 01 September 2012.
Revised on: 01 November 2012.
Accepted on: 22 December 2012.
___________________Applied Numerical Mathematics---ELSEVIER