Submitted on: 31 March 2019.
Revised on: 18 July 2019.
Accepted on: 13 August 2019.
___________________Journal of Numerical Mathematics
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Submitted on: 21 April 1999.
Revised on: 06 July 1999.
Accepted on: 28 August 1999.
___________________Journal of Numerical Mathematics
Submitted on: 13 May 2016.
Revised on: 09 August 2016.
Accepted on: 19 September 2016.
___________________Journal of Numerical Mathematics
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Submitted on: 25 November 2011.
Revised on: 19 February 2012.
Accepted on: 09 April 2012.
___________________Journal of Numerical Mathematics
Submitted on: 29 January 2018.
Revised on: 27 February 2018.
Accepted on: 14 April 2018.
___________________Journal of Numerical Mathematics
Submitted on: 27 September 2018.
Revised on: 17 November 2018.
Accepted on: 05 December 2018.
___________________Journal of Numerical Mathematics
Submitted on: 11 April 2006.
Revised on: 27 May 2006.
Accepted on: 07 July 2006.
___________________Journal of Numerical Mathematics
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